Why are men uncomfortable with their naked bodies around each other like women are?

I think men are scared to be naked around other men because it’s the whole “that’s gay” thing. It’s what society has instilled into boys and majority of them keep that mindset. However I know some guys that will change together and be naked in front of each other and their hetersexual. Women on the other hand, I feel like they are more comfortable with being naked around other girls. For me, I never was shy changing in front of someone, whether that Be a girl or a guy. But I also think it goes off of personality. Majority of introverted people will change in a different room, while majority of extroverted people don’t mind changing/being naked in front of others