@Xabid: Reasoning: Nipples are a part of breasts, so...

Xabid
2016-01-02T16:47:19-05:00

Reasoning: Nipples are a part of breasts, so covering your nipples means you're covering your breasts.

(Honestly, looking at the two tags, they seem to have almost the exact same types of things in them; it's very rare to have someone covering their breasts and not their nipples. So it might make sense to do this as an alias instead. But at the very least the implication seems appropriate.)