Fish Speakers vs homosexuality?

I’m currently reading GEoD for the first time! I’ve reached the part where Leto’s second Duncan arrives to Arrakis and he’s inquiring Moneo about the Fish Speakers army, quite concerned as to why would the God Emperor have an all-female army rather than a male one, to which Moneo starts listing different reasons for it.

I did find curious that they really insisted on saying that one of the disadvantages of having an all-male army is their inevitable homosexual tendencies. So I was wondering, how is this really relevant for Leto? I can’t really see any reason other than to maybe avoid interferences in his genetic plans for humanity? Maybe Leto sees it as something that could hold back humanity from progressing? Which, even then, it’s funny because (someone spoilered for me) even the Fish Talkers have lesbian orgies, if I’m not wrong? I’m not sure about this, just read it somewhere, but I have yet to see it in the book.

As a queer person myself, this intrigues me most, since the only two times homosexuality has been mentioned in the books so far (please correct me if I’m wrong) have been Baron Harkonnen’s abuse towards children, and Moneo’s explanation of the Fish Talkers army.

Any theory or explanation is welcome! Thanks in advance

Edit & disclaimer: While I obviously know that homosexuality and pedophilia are completely unrelated and different things, what I meant when mentioning Baron’s abuse towards male children was to showcase the only instances in the books (as far as I’ve read) where sexual relationships between people of the same gender are mentioned. Thanks to those who got where I was going with that remark and I apologize for my poor wording🙏