In Ontario, Canada: I was talking to gay friend of mine about when he went to donate plasma and was turned down being told that "any person who has ever had unprotected sex with a gay male, is not ever allowed to donate". So my questions lies in the that statement. I understand the stages of HIV development, or at least I think I do, and that makes sense to me. But what if someone has consistently tested negative for HIV over a year period? or a two year period? Why are those people never allowed to donate? Scenario: I had unprotected sex with my gay best friend, after he had sex with his tested boyfriend. Now, I haven't been tested (I know shame on me, I'm going Tuesday), but if I test negative over a period of whatever time, do I have to say I had sex with a gay male? Or should I just not worry about donating, and give up the idea? I have O+ blood, but we only host blood donations here every little while, and I'm wondering if they have the same rules. Can someone please explain this to me, I tried to do a search, but didn't get anything all that helpful to me.