Gold Saucer outfits, gender locked?

[kyuven]

Because you get reviled by one, doesn't mean it doesn't work that way. A lot of that is tied into the cultural reinforcement that exterior male sexuality somehow minimizes your own masculinity. Thats not a natural construct and is not present in every culture.

"Cultural reinforcement" isn't necessarily that way either. Some people are, independent of culture, uncomfortable with certain aspects of sexuality due to things including trauma, personal experience, or mental "disease."
Sexuality is one of the most complicated fields of psychology for a very good reason.
To use a cultural example, in Japan nudity in bathhouses is accepted, but there are still those, independent of their cultural reinforcement that "same gender nudity in the bath is fine" are uncomfortable around any sort of naked people. And the reasons for this are as numerous as branches on a tree.
"If you actually were a straight guy and saw a man in a speedo, there'd be no reaction." is presumptuous. There's even an argument that there are different gradients of "straight."
By your logic, since I look at a man and HAVE a reaction, even if that reaction is "uncomfortable queasiness," I am automatically not straight because, under your definition, straight men "should [have] no reaction" to naked men.
Conversely, by applying your logic differently, if a gay man looks at a naked woman and has any sort of reaction, he is automatically "not gay."
Your logic is unscientific and flawed. Sexuality is not something with any sort of absolutes to it.

Can you explain why you find males being sexy so unsettling? Because if you actually, legitimately find yourself distressed by such an innocuous sight, you might have some issues you need to work through with a professional.

"Distressed" has a gradient to it as well. The mentality mostly goes that men can often feel intimidated by other men's bodies. Remember that from a sexuality perspective, men can impregnate as many women as they want, while women can only be impregnated by a single man. There's a degree of competition that can "boil the blood" in certain men.
Rationally, most of us don't WANT to feel that way, but instinctively, deep down in our animal brains, a man expressing sexuality is seen as "competition."
Women have a similar reaction, tied to "slut shaming," but the reaction is overall different as men and women tend to always have different reactions to certain topics.
Me personally? I'm not attracted to men, never will be, and have trouble relating to them. My reasons are tied to childhood trauma.
However, I don't see anything wrong with a guy running around a game in a speedo, but I don't actually LIKE the appearance itself. In the same way I don't like Amon's hat.
Well, OK, I like men in speedos A LITTLE better than Amon's hat. Thing's atrocious.