"In Dreams" by Roy Orbison... as long as you avoid any remembrance of Blue Velvet while enjoying said love making (or do... if it makes your knickers tight remembering Blue Velvet)
A little Elton John goes a long way. This song definitely helps if you or your lover have Blue Eyes.
Toto's "I Won't Hold you back now". I love this song a lot, it seems especially like Baby Making Music to me.
Levitas1234 recommended this one, but I feel obliged to put the video up.
And everyone knows I'm an E.L.O. fanatic, so I'm plugging a band that I actually have tried the Baby Making Music angle with a special somebody before, it worked enough for me.