How much does size matter in an MFM threesome?

[tallnbi]

This has been my experience also in MFM scenarios - part of the appeal for them was to see the difference. It has certainly affected the performance of some of the coupled M's when they experience/view the reality, but others have been spurred on/inspired.

Having said that, the majority of threesomes I've had, the size was a key factor for setting them up to begin with - I'd be interested to see how the dynamic changes when its purely a surprise to all parties.

I once went to one where size was a surprise. The guy of the couple had told me he was 8" beforehand, but i didn't mention my size.

He was not close to 8" but his gf apparently believed him and thought i must be 10"+, so i just went along with it

 

[halcyondays]

I was the one with the big dick when I had a 3 way with a best friend and his girlfriend at uni. His cock was a little bigger than average and he had big balls which rocked a nice bulge in the skin tight jeans of the 1980s.

The 3 way was his idea not hers. Most of the time she blew the guy who wasn't fucking her. We even picked her up and spit roasted her. When not doing that we just took turns fucking her or resting and getting high. It was fun. We had a good time.

Then disaster. A month or two later he became insanely jealous. He accused us of hooking up behind his back. No matter how many times we told him there was nothing going on (there wasn't) he simply would not believe it. They broke up over it and I lost both as friends. Turned out she had expressed interest in doing another three way. It made him seethe.

No more three ways with friends after that. It's a rule I've kept for 45 years.

 

[sfarugby]

In my experience it tends to matter a lot, but maybe more to the guys than to the girl. First time I did mmf the couple were 10 years older than me but I had at least 2 inches on the other guy and it seemed to turn her on a lot, and him even more.

They ended up kissing around the head of my cock and swapping my precum with their tongues....apparently my size was a big deal for them, and it turned me on being the centre of attention like that

This is spot on with every one of my experiences

 

[BigBen]

I would hope that it is my personality and my demeanor and my blue eyes and stunningly white perfect teeth and smile that caused…over many years… so many couples to seek me out for fun…sometimes a 3sum…or just for the husband to watch his wife with her sex fun….but I know that most never notice any of that..,.they are all really just wanting to see for themselves, and experience….or experience again..,my endowment and virility.

 

[BeyondHorseHung]

Being a bull for many couples over the years one situation that comes to mind about this is one couple I met with. He was pretty average but my size being over six times larger than his at the time was quite an interesting interaction. At first, he’s kinda freaking out. You can tell he’s eyeballing me like he's thinking about calling it off. He get very tense, hands hovering like he’s not sure what to do.
Then she sees me and everything changes. Her eyes widen, starts breathing fast, reaching out without saying a word. That’s when he switches gears. He’s not backing off anymore and then gets behind her, hands on her hips, and he’s like, “This good?” She nods, and he’s nudging her my way, real careful. He’s helping her line it up, taking it slow. She’d tense up, and he’d chill for a sec, muttering something sweet to her, then look at me like, “Alright, let’s do this right.” At one point, he even grabs me making sure she’s set, guiding her down bit by bit. He's all in at this point.
The size difference is really messing with him. He’s staring sometimes, and I heard him mumble quite a few things under his breath. When she starts making these noises—ones he’s probably never heard—it’s like he’s torn between being excited and nervous but he rolls with it. He kept telling her things like “Easy, easy—okay, go for it.” Helping her take it, hands on her thighs, keeping her steady, and you can see he’s getting off on how wild she’s getting. My size isn’t just freaking him out—it’s turning him on, too, once he sees her lose it.

 

[sfarugby]

Being a bull for many couples over the years one situation that comes to mind about this is one couple I met with. He was pretty average but my size being over six times larger than his at the time was quite an interesting interaction. At first, he’s kinda freaking out. You can tell he’s eyeballing me like he's thinking about calling it off. He get very tense, hands hovering like he’s not sure what to do.
Then she sees me and everything changes. Her eyes widen, starts breathing fast, reaching out without saying a word. That’s when he switches gears. He’s not backing off anymore and then gets behind her, hands on her hips, and he’s like, “This good?” She nods, and he’s nudging her my way, real careful. He’s helping her line it up, taking it slow. She’d tense up, and he’d chill for a sec, muttering something sweet to her, then look at me like, “Alright, let’s do this right.” At one point, he even grabs me making sure she’s set, guiding her down bit by bit. He's all in at this point.
The size difference is really messing with him. He’s staring sometimes, and I heard him mumble quite a few things under his breath. When she starts making these noises—ones he’s probably never heard—it’s like he’s torn between being excited and nervous but he rolls with it. He kept telling her things like “Easy, easy—okay, go for it.” Helping her take it, hands on her thighs, keeping her steady, and you can see he’s getting off on how wild she’s getting. My size isn’t just freaking him out—it’s turning him on, too, once he sees her lose it.

That moment you she her lose control to what his bigger cock is doing to her body is my absolute favorite part!
Drives me nuts