Totally not my fave as I don`t even understand the lyrics, but somehow your Вопрос brought memories of this gem to my mind. :D As for songs I like, I could mention Black Eyed Peas - Sexy. There might be other, but I can`t think of anything else atm.
I Любовь this song since I was around 7. It's sounds crazy but I didn't understand the meaning of this song until I was in my teens since I learned about sex and reproduction when I was in fifth grade.
I must admit that I have been thinking about it for a while as I haven't got much when it comes to Sex being the main theme. Since ''I Like Big Butts And I Can Not Lie'' (Baby Got Back) is taken, another one that I recall and particularly liked is this: