I've put quite a bit of thought into this. Here's what I came up with:
Loveage (specially designed to enhance the mood)(I'm a man)
Bloodhound gang (chaisey lane, bad touch and discovery channel)
Garbage (take your pick)
504 boys (I can tell you wanna ....)
Elysium
Sex club
I mix that up which gets me throug foreplay, then you can throw in whatever you like, tool, ganja, elton john, the clash, you name it.
My experience is that I only notice what's playing about once per hour and during the scheduled water breaks every 45 minutes or so. I have a total of 2 hours of music and I put it on repeat. So, I know by the time Loveage starts again, that It's been two hours.
Happy grinding,
Gravity