I did a year at college where I met a lot of chicks. One night me and my buddy/roommate Mark were partying at a frat and there was this girl I knew from one of my classes that I had been flirting with some. She wasn't very hot but had a nice arse and huge tits I wanted to touch so bad. I grabbed a beer and went up to her and started making small talk. I don't think she knew anyone at the party, she was really happy to see me and we talked and she kept touching my shoulder and arm. Mark came over eventually and I was confused because she was flirting with both of us, had her hands all over both of us. We drank more and all got real drunk. The frat party was getting lame so I invited her back to our place to smoke with us. At this point we're all three sloppy drunk and she's giving us both kisses on the cheeks keeps rubbing my back and mark's shoulders and is hanging off both of us. At this point I figured one of us was going to get laid and even if it's Mark, maybe I'd get to watch.
We got back to the room and packed a bowl. She was sitting on Mark's lap at this point and stroking his hair while I took the first hit. We passed the bowl back and forth and she was telling us about how she's never done it with two guys at once. Feeling horny, drunk and stoned, I told her I was game for trying this. Mark was a little hesitant and said he didn't know. She took off his shirt and started sucking on his neck while she straddled him. I came up behind her and reached up her shirt and finally got to grab her nice tits. We moved it to the bed as she took turns making out with each of us while the other felt her tits up. Mark loosened up a bit and was getting into it, he pulled her pants down and started to finger her. She undid my pants and started to give me a handjob, and then Mark's pants with the other hand. My handjob led to a blowjob. As I laid back and started to really enjoy it, I noticed Mark sitting there alone, and he was a little bit out of it.
Here's where it got weird. I ain't gay, but I like giving blowjobs. I felt bad for Mark, so I turned myself around so I could reach over and blow him. I started to suck on it and he seemed to go with it for a little bit. Then, all the sudden he pulled his dick out of my mouth and punched me in the face. I was bleeding out my nose and she stopped blowing me. Mark was yelling like a lunatic and I was bleeding pretty heavy from my nose. She grabbed her shirt and left pretty quick. I got dressed and went to the bathroom to get some tissue for my nose while Mark kept yelling at me.
Things were awkward the next day, but we're cool now. I saw that girl twice afterwards, and she avoided me each time. I think Mark and I turned her off to group sex.