[MM] Completely straight guy who put a cock in my mouth surprised by how big he was.

I’m 29 male completely straight guy considering that I like only women and not men. Also I am well endowed and since I remember myself I was thinking of it and it was an ego-boost. I enjoyed stretching women and listening how much they like my cock and in porn I always preferred seeing big dicks performing. All this in a normal way tho and my size is not that crazy at around 7×6 inch. I have a friend from school that I knew him almost 10 years since that happened. He was not my closest friend and was not in my company but was spending time with him after school too at basketball training. We were just friends and nothing else. When I was 23 I met him and some other friends for a casual game. I had a lot weeks to see him and we were talking about life. While talking about our hookups I told him women struggle with my size etc. He laughed to provoke me and then I just opened my towel to show off and wear my clothes. It was something ordinary at locker rooms and I had never seen anyone bigger than me, only very few guys around my size.