It all started when me (Matt m26) and my girlfriend, Gina (f25), met with our friends, another couple. Sarah (f25) is Gina's best friend, and her boyfriend is Tom (m24). The two girls have known each other for years, and I have been with Gina for 3 years, so I also know Sarah well. We had many parties and adventures together, we can say that we nearly know everything about each other. Besides, I never think about Sarah as a girlfriend. We are really just friends. She is really hot, so naturally I fantasised about her but nothing more. Except one experience but I will tell that later. Tom is new in the group. He is with Sarah for 4 months.

So the 4 of us meet at Sarah's home, and the night starts like all of the previous ones. Chatting, drinking, some music, and some party games. After a couple of rounds, we were tipsy, and I had a naughty idea.

You have to know that I am a bit cocky and confident guy who is proud of his size. It started in the college years ago, when I won a cock size comparison game once at a wild party. That was the time when I realize that I have a good size and girls love it, and something is started then. I didn't get anything, just the rumours started and every girl wanted to know the truth. Good old times...

The second time when I won was a similar party with Gina and Sarah but the fourth was Mike, Sarah's ex. I beat him with 2 inches and as a reward Sarah and Gina gave me a double blowjob. At this time between Sarah and Mike there were problems so it wasn't a problem for her to do that. To be honest it was a bit cruel with Mike but I didn't care. Sarah wanted the blowjob so I agreed and Gina was OK with that either.

But back to the third time when I played that game was when we were together with Tom. Because of my past experiences and the effect of the alcohol I suggested that game again. At first Tom was shocked but finally all of us were in. The only difference was that we agreed that the reward will be a handjob. It was good for all of us. We didn't want to risk our friendship or Sarah and Tom's new relationship.

When the time had come, I was so excited and... to be honest confident about my victory. My cock is a bit more than 8 inches long and quite thick so I didn't fear of anything. The girls took off their tops and they sit there only in shorts and bra. Before we would drop our pants both of us were rock hard. It was a good feeling to freed my shaft and I was proud to show it for everyone. The girls loved the sight I saw it in their eyes but when Tom pulled down his pants Gina's eyes glued on his crotch. Sarah just smiled, of course she was ready for the result because she saw both of our cocks before but the exact difference surprised my girlfriend. I don't know if the girls discussed our sizes before or not, if yes, Gina only knew that Tom is also big and she didn't know his exact size. He wasn't so much bigger, around 1 inches, but the dirrenece between my a-bit-over 8inches cock and his huge 9 inch cock was clearly visible. We didn't have to use ruler. And he was thicker as well so he won that game in every ways.

To be honest at first I was so jealous and it was hard to me because I didn't expect that and I rather dominant in bed, so losing a contest like that was hard. Naturally my gf and Sarah had to finish the bet and they jerked his huge member. I won't lie, I was rock hard from the sight. Gina also saw that and after she saw that my cock is still hard she teased me all the time while she jerked his cock. She looked at my eyes smiling while she jerked his thick cock. Both girls could wank his member with both hands, there was enough space for four hands. I can't hold back and I started to jerk my cock as well. It was too hot not to do that. When Tom was close, Gina finished the job while Sarah reassured her. Gina loved that I saw and in the end he came on her hands. I have to say he cum a lot. I held back my orgasm and just edged but it was really hard. I wanted to save it for Gina later.

Gina at first was reluctant and she didn't want to do anything too slutty but she became more and more into it. She never seen any bigger cock than mine before so it was a really new experience for her. I know Sarah is more slutty than Gina, so she started to clean her hands and lick Tom's cum. I didn't believe my eyes but it was fucking hot. Gina didn't join her, she said later she didn't want to hurt me. After Sarah finished she kissed Gina, that was the next schock. I have to say the girls carried away. I didn't see exactly but I'm sure Sarah gave Gina some cum and she tasted Tom. Even if she doesn't admit it yet. I leave that to her, if it really happened I let it be her secret.

Later that night Gina sucked me in our room and the next morning we fucked a really wild under the influence of the naughty game. Since then we didn't do anything like that and I don't know we would ever do something more naughty. All of us were close friends and it was a really fun experience but we agreed with Gina that we will be loyal to each other. But one day. Who knows... Of course we talked about that night a lot of time since then and usually we rather roleplay something like that in bed. I tease her that Sarah is hotter and a better cock sucker and she tease me that Tom has a bigger and tastier cock. This gives something plus to our sex life. This half cuckold/half swinging experience was a mile in our life. We spoke about that maybe one day we will swap with them. But seeing Gina with them in a threesome would be fucking hot as well (yeah that's my hidden cuck side), and Gina said she would love to watch as we spitroast Sarah, or she would like to have sex with me companies Sarah. So we would live each role I think and add some dirty, soft humiliating talk would be such a turn on for all of us. We don't know how the other couple would react, but I'm sure Sarah would be into in any of the scenarios. Probably the first step will be that Gina will suggest that to Sarah and we will find out.