Since my wife and I frequently do couple swaps I have seen lots of erect cocks. They all seemed pretty much the same. Except for one guy who's cock had a larger angle pointing up. After he fucked my wife she commented on how if felt different
Doesn't that depend on who's checking? Reminds me of this old joke:
A nurse goes to check on a patient..she checks on her patient then quickly leaves the room. She goes to the nurses station to tell the other nurses what she has seen. Nurse says: "You'll never guess what I saw when I changed his bedpan. He has a tattoo on his penis that says "Swan"
The other nurse goes in to check it out and returns 5 minutes later saying: "You're right about the tattoo..... but it says "Saskatchewan"