What do you mean by "secondary sex characteristics"? Sure some heterosexual likes only the reproductive process as they find everything else (#Cunnilingus , #Fellatio and anal/vaginal sex for non-reproductive purposes) "dirty" or morally "wrong". I by the way, enjoy my heterosexuality for both sides reproductive and non-reproductive purposes with my girlfriend.

For me, I also enjoy my sexuality for non-reproduction purposes, like pleasuring my partner with #Cunnilingus or being pleasured by her through #Fellatio or whatever we are up to. And there is nothing wrong about that, oral sex is just fine.

I want to enjoy life, too. And it is short. Still I make sure that I have at least one or two descendants with at least one of my partners and I do have one own daughter. 😀