this is one of the points that cause people to point the finger against anime accusing them of causing the anime-tranny pipeline or tranimes.

japs have their waifu collection products where in order to have every new girl in the show interesting for horny audience they have to hit an all-increasing spectrum of quirks, personalities, and physical features.

When you have done with the hojousama waifu, the big titties dork waifu, the loli waifu, the icy beauty waifu, the crazy yandere waifu, etc, when even your competitors are doing so too, eventually, you get to the point of saturation you introduce the waifu with a new particularity: it's actually an HE and has a penis. this is nothing new they are doing it for a bit of time already

https://highschooldxd.fandom.com/wiki/Gasper_Vladi

there was a comedy anime that absolutely satirize this point into oblivion called: Baka no Test.

In this anime the cast of adolescent protagonists lust after the girls of their school, yet there is this male character called Hideyoshi who is a man, identifies as man, and does nothing, in particular, to appear feminine, yet his extremely effeminate looks caused characters and audiences alike to question their sexuality. everybody frequently mistakes him for a girl and there are way more gags around it, like how the love interests of the protagonist see him as a rival. how he win the female beauty contests etc. coup de grace Hideyoshi has a twin sister which is physically identical to him but the caster of protagonists shows zero interest in her. underlying the absurdity of the waifu-penis trope

https://bakatotest.fandom.com/wiki/Hideyoshi_Kinoshita

(kek notice how the page is locked)