Provence said:
Are breast hold and breast rest mutually exclusive? I think yes, first beause of the tagcount (15k vs 3k) and breast rest looks more like another person or object is supporting the breasts.
Breast rest doesn't mean supporting one's breasts with an arm or hands. I'd always thought this was pretty self-explanatory, but if we have to spell this out more clearly in the wiki, then so be it.