I go with 'Massive Attack' and alike. I really like trip-hop when it comes to sex, but I guess any soft and slow house music will do the trick as well, as long as it's not too disturbing.

Oh I have a whole playlist, but for now I'd just go with "Rebound Chick" LOL

"Do You Know the Way to San Jose" by Dionne Warwick 

Too cliche?

Something from my deep-house playlist. Clap Your Hands ( Solomun Remix) is perfect to set the mood.
https://www.youtube.com/watch?v=4hjOQ6_R8Fs

anything from M83!

https://www.youtube.com/watch?v=PkW1W9yDGq8 is awesome as well for this matter

https://www.youtube.com/watch?v=6f8GLKwIGLg - Absolutely beautiful.

Best in me marvin sapp

sex with me by rihanna or love galore by love galore sza and travis scott