My tuppence.
The sex moves add depth even if they don't come into play, I think.
Personal play-unsafe experience.
The process that lead me to play a driver as my character included considering how close to home her sex move. My character never had sex with anyone. At best it has no effects, at worst, you have to prove that they don't own you. So you are disincentivated in playing it.
"Hey, that's me!" is what I thought. Gotta play the driver. I did, was helluva fun. And gave my Impala a lot of character depth without coming into play. So I think that you should leave such moves as they are. Maybe they give the same sort of inspiration to your players, who knows?