Mannequin Etiquette?

I can't figure out if it's okay to grab a mannequin by the breasts or neck. The breasts are actually very well placed and they're the safest handles to use when grabbing the mannequin from behind and twisting the mannequin's torso to remove it from the legs, yet it feels a little inappropriate...and twisting the mannequin from the neck works well but it just feels wrong...