BUR #43033 has been rejected.
create implication mmf_threesome -> multiple_boys
create implication mmm_threesome -> multiple_boys
create implication ffm_threesome -> multiple_girls
create implication fff_threesome -> multiple_girls
I've seen a few instances of posts tagged with one of the threesome tags above but not with appropriated Nboys/Ngirls tags. While we cannot create an implication for the direct number (e.g. xxy_threesome does not imply 2x 1y, there might be bystanders), we can safely imply multiple_x.
I realize these aren't "necessary" if posts are tagged properly, but that applies to every implication :)
Full disclosure: I'm proposing these to reduce cases where my blacklists fail due to incomplete tagging.