male vs female frontal nudity

hello, I was just curious to know if there's a rule/protocol etc that prohibits ONLY male frontal nudity on tv shows/series, but not female frontal nudity. After watching so many tv series, I see in around 98% of (softcore) sex scenes, you see female frontal nudity but not male frontal nudity so...

hello, I have a question, maybe a silly one but still want to ask.. i have seen in western softcore movies/clips, i see female full frontal and full back nudity in almost every single movie, but i see male frontal nudity is almost never shown, and they try to take every step to hide the male...