It seems as though they just took 50 songs with some kind of sexual content in them and threw them together in a completely random order.
I would have to agree with most of the suggestions made by everyone here (especially Secret Garden!).
If I had to add two to my own personal list, they would be
"I Want You" -
http://www.youtube.com/watch?v=6C8buGnZDvU
and "Deep Inside of You" -
http://www.youtube.com/watch?v=O4gj5...eature=related
by Third Eye Blind.
Probably two of my all-time favorite songs, and sexier than most of the 50 that were listed.