Does penis size matter to HIV?
My penis size is 3to4 inches i had 3times unprotected sex but my penis size is small.can i get hiv?
Yes, you can get HIV this way. There is no correlation between penis size and HIV risk.
The only significant variable in terms of penises and HIV risks are related to circumcision. If a man is circumcised, his risk of acquiring HIV through insertive sex (or topping) is lowered by approximately 60-80% (http://www.thebody.com/content/80783/voluntary-medical-male-circumcision-the-basics.html). But his size still does not affect vulnerability to HIV.
If you enjoy sexual contact without latex barriers, and are interested in reducing risk of acquiring HIV, then you may wish to consider using PrEP. PrEP is a daily pill that prevents HIV by more than 99% when taken as prescribed. I don't know what part of the world you are writing from, but any doctor can prescribe PrEP, and you can find a global list of specialists here: https://www.pleaseprepme.global/. If you are not living in proximity to a provider, you may wish to go through an international pharmacy: https://www.prep.global/get-prep .
We discuss PrEP, HIV risks, and sexual health daily in the Facebook PrEP Facts group here: https://www.facebook.com/groups/PrEPFacts/ .
Thank you for writing in!