Do not let the comments like this get to you man. They are intimidating and totally unfounded. I have a couple of good female friends who were in a relationship with some hung guys and they told me they would never go back (to dating a hung guy again). At first, they said, it was interesting, but after a while, sex turned into nothing else but pain. They settled with avg size guys, and said they couldn't be happier.
Truth be told, it was on my wish list, but I can't say how would it feel to see her with another man and I will never know since we are divorced now. However, I can't say that I did not find the thought of it exciting. I've heard that so many men have this "fetish" but are afraid to admit. It does not matter whether the guy is hung or not, just the adrenalin running from seeing your partner being penetrated by another man. Not really sure what it is. There must be some scientific/psychological explanation behind it. I would go that far to say that I wouldn't not have been "terrified" of my partner enjoting a big cock, but the avg one. Again, most women want to have that experience in their life time, but whether that is something that makes the sex great every time, I doubt. There are so many other components to it. Our brains are our biggest arousal organs, and that is scientifically proven, however, as it is often the case, our brains can play games with us, including the enigma, or your desire to see your partner penetrated by a guy with a bigger dick. There is a lot of psychology behind it, rather than just a physical component of seeing, or rather thinking, your partner may enjoy a guy with a bigger dick. We all know, that is not the truth. But let me ask you this, if you were to go through that experience, have a hung guy have sex with your partner, and with you there, watching, you realize in the middle of it, that she is not loving it. Not enjoying. How would that make you feel? We are all operating here under the assumption that bigger is better, but we all know that is not necessarily the truth. Woild you feel like, omg, I just let a bull fuck my partner thinking it would be a great experience for both, but it turned out completely different.