the man in the comic became uncomfortable seeing it
I don't understand this point. The reason they're uncomfortable with it is because they're drawn in a sexualized manner? But even if all else is true, men in comics are already drawn in a way that many men think is attractive.
At least that's how I understand the point of the "power fantasy". Or do they mean literal physical strength with the "power fantasy"? Because the sexualization of men is definitely not limited to muscles.
Assuming the power fantasy is not just about physical strength, but also (or only) about extreme attractiveness (as perceived by men):
That is an idea that could be true. Are there statistics about how close the typical male hypersexualization is to women's interests compared to how close the typical female hypersexualization is to men's interests?