When a girl ignores all her other friends because she either has a new boyfriend or because her boyfriend is around. Female version of vag amnesia

when you're hungover as shit after a spending a night drunk as a skunk

When a woman has so much sex she's can't recollect who and when
When your sex was underwhelming, she forget she had sex with you.

When a girl is so used to having dick in her life that when she doesn’t, she craves it.

When you haven't had the dick in so long that you forget if it was good or not.