Tag Implication: single_thighhigh -> thighhighs

Implicating single_thighhigh -> thighhighs.

Reason: Since it describes a thighhigh it should be implicated to thighhighs.

Done

(I'm late, as always, but it's better than never I guess)

I thought we don't implicate singular tags to the plural ones. Or something has changed?

I don't think a standard was ever established I guess you're free to suggest them all now.

I consider them a natural pair (the exceptions in this tag notwithstanding) so it's a gray area.