?

first of all, the sarcasm i have seen here and elsewhere is by no means limited to, or even mostly from, young men, or men, or the young. second of all, a lot of what passes for sarcasm is only snarkiness. so we have not actually correctly defined sarcasm (two of the three definitions are not even sourced). and third of all, while sarcasm isn't called for as often as it is delivered, sometimes it is called for. for the record, i think lazarus is wrong, especially since he appears to assume that all sarcasm is delivered to its object. sarcasm is often (i have not done a poll so i shall not pretend to know HOW often) delivered to someone who agrees with it, and its object is a third party, generally not present. for example, i might say to my guy, "oh yes, trump is doing SUCH a great job." it will be my tone, not the words, that render this sarcastic. trump can't hear me (as if i would spare his tender feelings if he could -- yes, this parenthetical phrase is sarcastic).

so to ask why young men think sarcastic humor is positive you must assume that young men think sarcastic humor is positive. you back up your assumption, but the quotations from your backup do not do the trick, because lazarus makes assumptions of his own, and the quotation from holmes doesn't specify sarcasm as the reason she thinks young men are not very charming. since i dispute those claims, and do not agree with the premise, i can't answer "why" except as above.

g

They are immature and they think it's funny they also think that poop is funny you got to consider the source

I don't quite get it--is it their messages that are sarcastic or their questions on the help forum?