Even though my brother is also gay, I've never done anything with him...or even thought about it. It also has never even crossed my mind to mess with my sons (though they are now adults).
OTOH, I did play with identical twin brothers a couple of times during a month in Houston. It was both really hot, and really strange. There was a mirrored wall opposite the beds (more on that in a moment), and watching them take turns fucking each other was like a surreal optical illusion. Another really wild bit was standing in front of the mirror and going from looking down at them pigging out on my cock and balls, to watching the scene in the mirror. I really got off on that, and also shoving my dick in one's ass or mouth, then going to the next one, and back again.
What was particularly strange in my book was how it felt like I was nothing more than a two-legged dildo. It was obvious that they were far more into doing it with each other, even though I had no other interest in them beyond fucking them. Even stranger (which I found out the second time I got with them) was how they lived across the street from each other in a cookie-cutter condo subdivision: both units were absolutely identical down to the furniture, photos, even placement of things in the kitchen cabinets and bric-a-brac. And, both of their bedrooms had 2 twin beds (same pattern sheets) with a mirrored wall opposite them. This behavior definitely had to have its roots in some major incest in their childhoods but, as I said, I wasn't there to analyze their backstory.
I have messed around with some other brothers over the years, mostly not at the same time, but a few were. Thankfully, none of them were fodder for a Springer episode -- just good, wholesome sucking and fucking.
