I have not barebacked with guys that often. But the few times I have, there's a few reasons. Barebacking feels more natural is one reason. Plus risk taking is another. BB is risky, everyone knows that. So anon sex BB with a stranger is risky and thrilling. There is a danger but its not known. Like climbing a mountain or base jumping and other dangerous sports - people get an adrenaline rush from taking the risk. It's like when that mountain climber was asked why they took such risks of dying and they answered "I didn't go up the mountain to die, I went up there to live!" It's the same kind of thrill. I'm not a bug chaser - far from it - but taking a full load of cum from a raw bare cock in risky anon sex is hot and thrilling! Never done it with someone who claimed to be pos but once did it when I was drunk with a guy who I later found out was pos (but didn't get infected) - despite the scare, it was the hottest sex I've ever had. For me, I think taking a load from a pos guy with a very low viral load would be hottest of all - taking a very real risk but not a large one - although there is something hot about not knowing & not being able to be sure of anything.