The first male nude photos I have tried to shoot was with my brother as model and I found it difficult to photograph male nude. With women it is easier find a good body composition which match the women body language and personality. While with man I found all my shots weird, because it was a male nude with female body language, and it wasn't intentionally but I just was trying to find a good body composition and probably my experience with female models influenced on it.
My brother when looked at it he said "you made me look/pose like gay".
Nothing against homosexuality but it is clear to me that photograph male and female are two completely different things with different body composition and visual language.