Dealias foursome from group sex

BUR #515 is pending approval.

remove alias foursome -> group_sex
create implication foursome -> group_sex

I come back from my vacation with a proposal for moving away from Danbooru traditions. I've always found the foursome alias to be unhelpful. The reason is that I think a foursome is an easily identifiable form of group sex that deserves to stand on its own. Posts like post #74950 or post #93750 are neither gangbangs or orgies, they're foursomes, 4 characters having sex while "connected".
Since there's no need to do everything exactly as Danbooru, I think it's better to do away with this alias. Not so much with fivesome because that one bleeds a lot more into regular gangbang.

How is that not group sex? All participants are engaged with sexual activities with each other. Even in the posts you link it's not as if it's two completely separate and parallel sex acts, the girls are actively kissing each other.

Jemnite said:

How is that not group sex? All participants are engaged with sexual activities with each other. Even in the posts you link it's not as if it's two completely separate and parallel sex acts, the girls are actively kissing each other.

They arent suggesting its not group sex, they are saying that a foursome is a specific enough type of group sex different from orgies or gangbangs to warrant its own tag with an implication not an alias.