Exceptional topic! Personally, I enjoy smooth ambient setting:
Gabin - Slow Dancing https://www.youtube.com/watch?v=F4-EqJPmB7A&list=PL_z6iuxfMZWGq2BYZbhHy_rMCym3466zI&index=4
Slow with deep intensity. So intense it makes your girl's toes curl.
John Martyn - Sunshines https://www.youtube.com/watch?v=F4-EqJPmB7A
Best enjoyed when your at another level.
Then there is the standard R&B routine:
Keith Sweat - Nobody https://www.youtube.com/watch?v=8D4laEXpBDw
Keith Sweat - I'll Give All my Love To You https://www.youtube.com/watch?v=MC6YLqio-bI (Personal Favorite)
Guy - Let's Chill https://www.youtube.com/watch?v=nwmmnV_bcQU&index=1&list=PL_z6iuxfMZWHcis267bBN_NkuQ-OIQmNn
Joe - I wanna know https://www.youtube.com/watch?v=rZNnzotc3yA
Doc Box & B Fresh - Slow Love https://www.youtube.com/watch?v=D7uFeg1UgvY&list=PL_z6iuxfMZWHcis267bBN_NkuQ-OIQmNn&index=6
R Kelley - Honey Love https://www.youtube.com/watch?v=wfVzdG2_448
Ok enough! Enjoy! =