Austin,
Lots of guys compare d1cks.
It's normal to be curious about ur friends.
Your friend seems curious but feels guilty and/or embarrassed.
Next time you're talking about sexual stuff, just say, 'hey, can I ask u a really personal question?'
He'll say 'yes' cuz everybody wants to know what that question is going to be.
Then say, 'whenever we've talked about our d1cks, I get pretty horny. I'm kind of embarrassed to say this, but Tbh, I really would like to compare. I still like girls of course, and I don't see anything wrong with checking each other out. I know I've said I'm long but that doesn't matter. I just want to see one besides my own close up. Would u do me a favor, and let's get them out to compare?'
I'm almost certain - based on what u said - that he wants to and will say yes.
43% of men (according to The Hite Report on Male Sexuality) masturbated w/ other males as teens, so the number of guys who compared must be even higher.
I enjoyed seeing my friends' hard but I grew up straight, as did they. It helped me realize we're all fairly similar in size.