I'd been dating my girlfriend for 2 years when she moved into an apartment with another guy.  I can't say I was happy about it but we'd discussed living together and decided that it wasn't the best idea.  Her new room mate was an OK guy and we got on so everything was cool.

I'd go over to their apartment and stay over.  I'm sure he heard us because we weren't quiet.  We'd be at it all night and his room was right next to hers so I know he heard us - but it just added some spice to what we were doing.

He had the occational girlfriend stay over but it was never the same one.

Anyway, one day Kim had gone to work quite early and left me in bed sleeping.  I woke up and needed the bathroom.  I didn't bother to put any underwear on, I just went to the bathroom.  As I walked past Gregs door I saw that it was ajar.  I couldn't help but peep inside and couldn't believe my eyes.  He was lying on the bed butt naked and had the biggest hardest dick that I had ever seen.  I just stood there looking at it. It was 10 inches long and looked as though I wouldn't be able to get my hand around it.

I looked down and realised that my dick had grown too, how could I be turned on by the sight of another man = I'm straight i thought.  I moved away and went into the bathroom and started to stroke my throbbing dick.  i tried thinking of Kim but I all I could think about was Greg's big dick.  I started to breath hard and pump my dick faster and closed my eyes.  this is why I didn't see or hear Greg come into the bathroom behind me.  The first thing I knew he was there was when I felt someones hand on my dick.  "Here, let me help you with that," he said and started to pump my dick.  i dont' know what I was thinking because I stood there and let him.  I'm 8 inches and 4 around but his dick made mine look like a finger. 

It wasn't long before I shot my load all over his hand.  he laughed and then said that it was only right that I should return the favor.  I don't know what got into me but instead of putting my hand on his dick I was on my knees and had that big hard dick in my mouth.  i couldn't get it all in so I took as much as I could get and moved my mouth up and down his shaft.  he started to moan and before long shot his load in my mouth.  I've never seen so much cum, it ran down my chin.

I was unsure what to do next, i'd never been in this position before so i muttered to him, "I'm straight," he replied, "so am I!"

He led me by the hand and took me back to his room.  I hadn't realised that I was hard again.  i kept trying so hard to think of Kim but hell that big dick just kept entering my head.

He lay me on the bed and began to massage my balls and dick, I was getting so hot.  "Fuck my ass," he whispered in ear.  I'd wanted Kim to try this for a long time but she wouldn't because i was so big, but he'd obviously done this before.  He turned around and was on all fours.  I got behind him and positioned my dick in his ass hole and gently started to moved it in.  I couldn't believe how easy it went in.  I had the whole 8 inches in there and began to move it in and out gently as first until he started to shout, "fuck me harder, ram it in me, that's it let me hear your balls slap against my ass."  This really made me hot and I rammed his ass again and again.  i could hear him pulling on his dick and then he told me to stop for a while.  he flipped over and put his legs up on my shoulders and I put my dick back in his hole I could feel my balls tighten as I slammed him hard, he was jacking his dick off too and we both shot our loads at the same time.  Jesus I couldn't believe what I'd just done. 

He kissed me on the mouth and said it would be our secret.

Later that day when Kim came back from work while she was getting changed and she was bending over I saw her pussy lips and just thought of Greg and his butt hole and got sooooo hard.  I went over to her pulling my pants down and releasing my rock hard dick and pulled her panties down and rammed my dick into her pussy.  She was shocked to say the least but lay over the bed so I could fuck her hard.  I put my hand around her and started to stroke her clit, I was on fire and just wanted to fuck anything that had a hole.  I was pounding her good and hard and she was making lots of noise.  She knew that this made me hornier so i told her to talk dirty.  She was so good at that and told me how she'd had to go to the bathroom and jack off herself because she'd been thinking about me.  i told her I'd jacked off too but not the reason why.

We were in a frenzy of sex so again I didn't hear Greg come into the room.  I was fucking Kims pussy and all of a sudden Greg rammed his dick up my ass.  I stopped dead in my tracks = it was the best feeling I have ever felt.  Kim turned around to look what was going on and just smiled, reached around and grabbed my balls.  As I was going into her  Greg was pulling out of me, as I came out of her Greg would go into me.  The feeling in my ass was soooo good it didn't take long for me to shoot my load, right about the time Greg filled my ass with his cum and right after Kim gave a loud screem as she hit the mark too.

We sat on a heap on the floor.  Kim leaned over and kissed me while she touched Gregs dick.  "I see you've met donkey kong!"  was all she said.

I've moved into the apartment now and we still enjoy our threesomes but I still enjoy Gregs dick on my own when kim isn't around.  i still consider myself straight but I'm in love with his 10 dick.