I was only spanked once by my dad when I was a teen, and now I think I miss that. Wished to have it happen again, but not by directly asking him to do it. PM is open in case any of you guys can discuss it further.
Everyone was 18+ when this happened.
My brother was visiting home for my birthday the next day and we were alone at the time. It all started because we were chatting about sending nude pictures to others, and I said I didn't like it because I was afraid of it leaking. He then said I only had that fear because mine was weak and small, and I tried to deny it, but he kept insisting on it.
I basically got fed up, but he told me to wait and decided to compare with me. When we both got hard, it was very clear that he was way bigger than me down there. His is around 19 cm while mine is 11 cm. Not only that, but his was way thicker.
I got a bit angry with him teasing me, but eventually it all stopped, and we changed subjects, neither him nor me have talked about it since.
Edit: Small correction about size after remeasuring my dick. Edit 2: Some details that I left out, he's also bigger than me in height by quite a good margin. Also I'm cut and he's uncut.