Implicating armpit_hair → body_hair
Link to implication

Reason:

Other implications:

Arm_hair -> body_hair
Leg_hair -> body_hair
Stomach_hair -> body_hair

Happy_trail -> stomach_hair
Chest_tuft -> chest_hair

The tags for hair on the butt and hair on balls also need to be cleaned up, but that might be for another thread.

BrokenClock said:

Implications:

armpit_hair → body_hair.
arm_hair → body_hair.
leg_hair → body_hair.
stomach_hair → body_hair.
happy_trail → stomach_hair.

+1. All those seem accurate.

BrokenClock said:

Implications:

chest_tuft → chest_hair.

-1. Usually chest tufts aren't body hair at all, but fur or feather tufts.

-/-/-/-/-

¹ By BrokenClock.

² By BrokenClock (reversed).

³ By Circeus.

Note 1: if it isn't marked is because it is my suggestion.

Note 2: although some of the tags involved in those suggestions aren't very tagged, I think that would be better to fix the issue completely.