What a bunch of jerks.
The guy is asking a simple question and you give him a bunch of worthless joke answers. HIV is no laughing matter.
Sorry, OP. I apologize for that kind of behavior here.
Anyways, everyone knows that if you suspect that your new lady friend may be an unfortunate carrier of that tragic virus, all you have to do is flush her vagina with one quart of bleach 15 minutes prior to having intercourse.
Be sure to use an unscented bleach. You may want to use a high powered delivery system to get the bleach in to the hard to reach places in the back. Odds are that your particular penis won't reach that far, but it's better safe than sorry.
Some useful high powered delivery systems that have worked in the past are Super Soaker™ water guns (Just pump, put the barrel in as far as possible, and squeeze for 20 seconds), or a broom handle wrapped with a bleach soaked towel (simply insert the tip and give a swift, firm push until it won't go in any farther).
laugh out loud