let's talk for a minute about how hiv is transmitted. the human immunodeficiency virus (hiv) spreads from person to person by direct contact with infected bodily fluids such as semen blood or vaginal fluids. any exposure to hiv results in a risk of getting the virus yourself. however the exact risk of acquiring hiv from a single exposure isn't known. in short it's impossible to answer your question because there are too many unknown factors. if you performed an unprotected (no condom used) penile insertion with an hiv positive individual (even for just one second) then you have some risk of getting hiv yourself. if your partner does not have hiv then you have no risk of getting hiv because the virus can only be acquired from direct exposure to infected bodily fluids. that said it's never a good idea to have unprotected sex whether anally or vaginally because many other sexually transmitted diseases (stds) exist and can be spread in this way. especially if you're having sex with multiple partners you're always well-advised to use a condom -- for your own protection and your partner's.
i have stick my penis in a guy for 1 second what is my chances to get infected with hiv?