I've been gang-banged by five guys at once, taking turns, and I've been double-penetrated anally several times (I love it, even though it can hurt). You get me in a steam room with a bottle of poppers and some hot guys, and I'll take them all on, I don't care how many. A while back I was in the dark area of a bath house in Vegas, and I just let as many guys ride me as possible, two of whom forcibly raped me. Luckily, I'm into that. I probably took at least 7 or 8 guys in about an hour in that room.
I REALLY love having one buttfuck me while another is shoving his cock down my throat. I also like it when a guy pisses inside me while fucking me, or in my mouth as I suck him. Do that, and I'm your bitch for life. And since I prefer hung Black men, I've had to learn how to take big cocks. Direction of thrust is what it's all about: if a guy hits my prostate, by thrusting downward like in porn films, IT HURTS! But if I'm on all fours and he goes in horizontally, parallel to my spine, I can take a good 12 inches. Thickness is not a problem as long as I can work up to it over a few minutes. I also have great muscle control down inside my butt, so I can milk a guy until his eyes roll back in his head, and my anus is NOT loose, because I work it and keep it toned. I prefer BB sex with other POZ guys, and I'll tell you right now, if you're going to do multiples, rubbers will tear your rectum up no matter how much lube you use, and you will bleed. Bareback is smoother, but inherently unsafe, and we all know why. As a POZ guy, I want POZ or POZ-friendly guys ONLY!
In short, it's a hot, fun thing to do, but BE CAREFUL!