I am no expert, but I've also heard that they give you a pregnancy test before the surgery, as it can be hazardous for the baby if he or she is there. Regarding other tests, I have no idea. Again, though, sex before surgery seems to be a bad idea either way. Better be prepared and focused on your health rather than satisfaction and pleasure. But, if you really feel like you need to relieve some stress, sex toys are always there for you. My favorite is this cock randy sean cody from lovermart.com, which I've been using for some time. But, all in all, you should always consult a doctor!