1.
First time you have sex.
3.
First time you try a really weird position.
4.
First time you have failed sex.
5.
First sex in an ~unusual~ place.
7.
First time you have sex in their childhood bedroom.
8.
First time you try the sex position you know is going to be a keeper.
9.
First time you realise you haven't bothered with another sex position for a while.