I'd suggest a massage parlour or escort would do the trick.
Seriously.
No commitment, no complications, no hurting your recent ex, no gossip to feed the future MDs hanging out drinking in the lab during late nights (why am I surprised at reading this?)
In short, you can have a knock out woman take care of your sexual needs, you get the relief you are looking for and you will be able to think straight.
I don't know where you live, but Toronto has many a fine high quality, super clean, LEGAL massage parlours where you can find a Bay Watch quality woman who will get naked with you, give you a nice massage, then finish you off with the perverbial happy ending. You leave $150 lighter and with a bounce in your step. Of course, you'll probably want to move here after that.
U of T has a fine Med School by the way..
http://www.alluremassage.ca/
http://www.handsfromheaven.ca/
http://www.steelesroyalmassage.com/
http://www.utopiamassage.com/
To name but a few.