A girlfriend of mine got her snip a couple of weeks ago. She had sex the same night. *sigh* Girl's got a virile little boy she's running around with...
Her hormone levels went all ->-bleeped-<-ted up after her op, though. Some people here have posted they had to stay on, say, avodart after the op for best results. Others have argued that if you've been on AA for several years you can stop after the operation. I don't think there's much research on the matter.