I had mcdonalds last night, and I got a bigmac. I went through the drive thru and took ma food home and ate it like 15 2 20 minutes later. I started to eat the burger and half way through it was kinda salty so I spit it out. Then I touch my burger to make sure nothing was on it. I finished the majority of da burger and started to think, what if they put semen on my burger. Is it possible to catch hiv this way.?