This edition of Friday Weird Science from Neurotic Physiology asks a question that many women and most men have probably wondered at least once in their life: How does she keep that thing up? There was an actual paper that studied this, for science.
We have the forces F1 and F2, equal (presumably) and opposite, forcing the breasts apart (lift and separate!). You have the weight of the top (W), and the upward force of the fabric (V), which is due to the tightness of the fabric above the navel (plane A). Enough upward force (V), and the whole thing is at equilibrium and nothing falls down.
I figured that the reason they stayed up was one of Victoria’s many secrets, but it’s nice to know that physics could play a part.
Do check the whole post out. Or, you know, use that boob tape stuff.