I don't understand what is pleasurable hurting another guy's penis. Sex for me isn't a win lose thing. So this concept is totally alien. And, having known someone who (stupidly) mixed Cialis with poppers and almost died when he hit the floor and snapped his dick, and the fallout from that (Years of listening to him going through stories about surgery treatments, how he couldn't get it up, the psychological damage etc.), I would never want anyone to go through that.
I would never...never...want to physically hurt or injure another guy's penis or balls. Not in to physical pain either giving or receiving.
It is unfortunate that in the past, some times...but thankfully not always...but too often... when I have been in situations as a life long nudist and also as someone who has been, off and on, in the "lifestyle" for most of my life...and been "challenged" or asked to "compare" by another extremely endowed horse dicked guy, with their wife or girlfriend present and often others too...sometimes a lot of others...big crowd comes to mind...that while the other guy and his wife/girlfriends and anyone else goes "WOW" and their obviously sexually aroused reactions, that sometimes the other guy...and...or...their wife/girlfriend is...upset...dismayed...embarrassed....humiliated...all a form of "hurt"...I don't like that when I see that reaction in others... and don't like them feeling those emotions.
And while it has happened that the other guy was...upset/dismayed/embarrassed...when it is the other guys wife or girlfriend who is the most shocked that her "man"..."lost"..."beat"...then upset...dismayed...and humiliated and "hurt"...that is a reaction that is really unfortunate.
That said, many things can be erotic and sexually exciting.
And while it is not common because extreme size is not common....in all those encounters at nudist resorts and beaches and the many times at "lifestyle" parties and "conventions", and even in chance meetings...serendipity...I have never yet seen another guy who was endowed with a "big" or "huge" or "gigantic" "monster" who did not get sexually excited and hard as a rock and wanted to see and did not encourage their wife or girlfriend to hold and play with and try to lick and even try to fuck the guy who had an even bigger and more virile endowment than their own "whopper".