Awkwardly found out my bestfriend is hung. Am I going to become a cuck. [m4a]

Recently a few people in my friend group have joked about my bestfriend having a huge cock right in front of me and my girlfriend. It was uncomfortable while it was happening but I can’t stop thinking about it. I am really curious to what my girlfriend was thinking when hearing this. She laughed and covered her face while holding my hand. I am nervous to bring it up in front of her. We see this friend almost weekly I feel like it’s going to change my dynamic and opinion of him for some reason. I’d love to chat with someone who has been through something similar. I can’t understand why I am so interested in knowing what she thought.

I have fantasied of her being with another man before. It’s just not something we have ever spoken about. I just felt the energy was different after everyone got done talking about it. I feel like it’s going to be weird the next time he is at my house. I don’t know why I feel so weird about my girlfriend knowing he is probably bigger than me. It’s messing with my ego but also interesting me. My buddies joked about seeing him in the locker room like it was something out of this world. I could tell even my buddies girlfriend was uncomfortable with the rest of the friend group hearing this and laughing.