Or maybe a job interview
So true! They were the worst for me because the employer held all the cards, often played mind games with the interviewees, so it was hard to keep my brain working when I had so much resentment about the power imbalance between them and me. At least in the dating world the power is more balanced, but seems like, by definition, once you have fallen in love with someone they take on having all the power in the relationship. Unless of course it's that rare situation of both people being in love with the other. I suppose at that point the power is equal between them.
My brain usually worked fine during exams, not as well when in love..., still probably better than most since I never tried to remake myself or threw away my life for anyone with a doomed relationship. Never knocked anyone up either.