Gender swap skins?

Title.

Why isn't there a skin line that shows how champions would look like if they were gender swapped?

From what I understand skins function to fulfil an alternate fantasy of a champion. So why not fulfill the fantasy of a place where the champions have their genders reversed.

I would love to call the line Reverse but there is already a Reverse Annie so maybe a different name. I acknowledge and appreciate that you guys don't go to crazy with your skins so that they are instantly recognized in a game but I do believe you guys are also creative enough to swap the gender but keep the silhouette similar to the base skin.

I personally would love a gender swapped version of Yasuo, Twisted Fate, Rengar and quite obviously Janna.