This is a question that came up on a guy's fashion video. That is not the whole subject discussed and it covers question like "Is it OK for guys to cry?" or "Is it OK for guys to wear a V neck shirt or skinny jeans?". He is discussing fashion choices.
The above question is handled as liberating guys to be creative, and be yourself. Something I encourage through escapes. Maybe dressed fully as opposite gender or maybe just androgynous - ESCAPE!.
Push your own agenda and be you.
Is it OK for guys to wear V necks?
Does What You Wear Make You Less of A Man?