It’s all for attention. They get attention when they post it. Attention when they call men out for looking. Just thirst for attention. Shorty in the pic is young though 23 I think.
Well, i guess it is attention, plus influence. Maybe they saw someone doing the same and thought they should try it out. Also, how would we know that she has an "iPhone" and nice ASSets? That is hard to capture with a normal short... I guess.