I love kissing with a tease of the tongue, though what I really dislike is a man who thinks french kissing involves sticking their tongue down your throat or eating your whole face or slobbering everywhere or a combination of all three.
When done right, french kissing makes me go weak at the knees and turn into a puddle of mush. Though thankfully I have known some amazing kissers, so know there are good ones out there.

My first thought as a survivor of molestations is that she may have been messed with at a young age. My first memory of being assaulted was at age 3. That could turn her off if it. But as others have said, different people have different quirks. It could be nothing at all.

Not everyone is good at French kissing; and, when it is bad--it can be really bad. Perhaps she has simply not been with someone who is good at it. Or, it is something she simply will not like-- no matter what; and there is nothing to say that she must.

I don't like being touched at all, and people (family and doctors) have asked if it is related to any trauma. It isn't for me. I've never liked being touched, even as a child I would never hug my friends or parents.
Kissing seems totally disgusting. I've never tried it. It's just a personal feeling. As long as she feels it's normal, that's cool. But, if your friend thinks there may be something else to it, particularly if it's a way she doesn't want to feel, maybe talking to a therapist is a good choice for her.
I hope my friends who enjoy sexual activity find happiness. I hope your friend finds happiness in her relationships too.

If she doesn't like it , don't do it...
K.I.S.S....... Keep it simple sweetheart ...

We call it snogging and I love it.
I had an ex that wasn't all that keen. I can see how tongues and saliva could be gross to some, guess they are.

I understand your friend's discomfort about French kissing. I have learned over time to accommodate women who like it, and will give them some. But I prefer lip kissing, (whether soft or passionate). And my transfer from one to another can be a signal to my partner as to my state of arousal. To me the French kissing sends me a signal that "Oh, now I have to perform something weird", rather than just enjoy a natural connection with another human being....and all the other pleasures that await. I am guessing that your friend, like myself, is a sensitive person.

I'm kind of funny about it. If it is just a hookup, maybe kisses on the cheek or lips, but I need to be more committed to French kiss. Seems to me to be more personal.

If other aspects of intimate contact are fine it could just be her quirk. Human sexuality is soooo diverse. I don't enjoy 69, I'll give all the BJ's (felatio) my man wants but I do not enjoy cunnilingus. As to french kissing a little tongue if fun too much is yukky. If it really botheres her a therapist might help her find some answers.

As long as there aren't all those slurping, suck your whole face in noises, I'm in.

She may just be a kind of germophobe. Mouths can be pretty gross (Just like other body parts) if they aren't well kept... and some, it just doesn't matter, not even fire, battery acid, and bleach can get rid of the funk. Maybe she had someone in her past who was just gross that traumatized her without even being sexual. You say she likes everything else... she just needs to let whoever she gets with know, right up front, that that's on her list of 'don't go there'.

If done right, it's okay. Most of the men I've been with though have no clue what they are doing.

Admittedly - I'm not a huge fan of it either. I thought it was "The Bomb" when I was a pre-sex virgin - but unless it leads to somewhere less oral and more genital in my adulthood,... I don't see it as something fantastic either.

Does that make me a weirdo? Or just too focused on an endgame as regards sex and its preludes?

We all have our unique likes and dislikes. I am not surprised. In some cultures public kissing is frowned upon and is taboo.

I don't like French kissing because it reminds me of how dogs kiss.

I don't know if its unusual, but I feel sorry for her!!!

People are incredibly varied in all details of sexuality. It's why it is so difficult to find a really perfect match. Lots of relationships have issues around sex because they don't account for the inevitable differences.

Some people really don't like exchanging bodily fluids with anyone. When you actually stop to consider it, It's really not that unreasonable.

I don't think it's weird... depending on the kisser, I've often found it gross as well.

I never thought about it, then a number of ladies complimented my kissing, and one ion particular goes crazy over it. Made me self conscious, then she complained we never kissed enough, that made it worse, I felt under pressure so avoided it even more. But it is not just french kissing, my least fave accent on a woman is French. This is not anything against France or french people in general, my least fave accent in a guy is Irish, but it is by far my fave in women, oh and Dutch, hmm, German, Swedish, hmm, ok all except french. But back on the kissing, not all women dig it and it has been quite a few years now since I indulged with out being conscious of doing so, ie I feel it is more a requirement rather than something I do instinctively now. I am very happy to be with women who are not into it.

I think it's gross too. My ex rammed his tongue down my throat.

I don't care, I don't like it much. I'm not a fan of bodily fluids. When a man forces his tongue down my throat it feels like my mouth is being violated.

French kissing is so intimate. It's an absolute must for me. However, forcing your tongue deep into my mouth is is a red flag, and it's going to turn me off. Luckily, this has only happened to me once, on the same night that relationship ended.

Personal choice ....totally her choice. ...maybe she is afraid of snakes and frogs who use long tongues to capture and eat bugs. ?.....we kiss where we drink eat breathe brush teeth and some people "smoke" pressing soft lips together is not universal. ...I am told Eskimos rub noses but don't kiss. ....accept the way she reports her choices and reassure her what is normal for her is all that matters. ...if she wants to change and try sticking her tongue into a lover's mouth. ...she's in control and she need only tell her lover's tongue to stay behind the teeth until she works things out