* You could be at risk if the receiver has just topped someone else.
** Very low risk.
*** Unprotected anal sex is a very high risk activity for a bottom, much more so than for a top. The risk of HIV transmission to a bottom during unprotected anal sex is 15 in 1,000 versus 3 in 10,000 from a bottom to a top.
How safe is frottage and general rubbing around?
Latex, polyurethane, male, female -- we've got the lowdown on them all.