It doesn't hurt. :) 

I never waited around after bding. Always ran right to the bathroom to urinate. Still got pregnant so I think the theory isn't true. They say the sperm reaches it's destination within seconds.

It's less the legs & more the hips. After finishing, don't get up but put a pillow under your butt & lay there for a bit. Worked for me the first month of TTC.

I did it for 10 mins at a time. Can't do any harm x