A character does something courageous, traumatic, monumental or suicidal to have sex.
Simon: I mean to say...
Kaylee: (cocks her gun) Hell with this. I'm gonna live!A character knows that they need to get laid. And they want to. Desperately, in fact. The thing is, getting it (or at least, with the person they want) is an ordeal. They need to move mountains, walk on hot coals, drag carts through the desert, and single-handedly defeat The Empire. Or, they think they do anyway. This motivation is all they need. Tends to overlap with Love Makes You Evil, Love Makes You Crazy, and Love Makes You Stupid. May invoke My Biological Clock Is Ticking, I Want Grandkids, or good old-fashioned Deus Sex Machina. Note: This trope does not apply for obscure instances. Not every Save the Princess trope is this plot (not even when it involves a Standard Hero Reward). Also, there is a difference between doing these things for love and doing them for sex. Examples must be the latter. Also: incidentally, this is the◊ Trope Namer.