there are occupational hazards to having large breasts.
say you are walking down the street with some super excellent coconut gelato, loving life.
then, because it's warm out, the gelato starts to get a little melty.
and when you lift your spoon, a glob of it slides off the spoon (the little gelato shovely spoon that really isn't all that concave so it leaves extra room for slippage), and right down your shirt. and not because you're wearing a particularly low cut shirt, but because it's a button-down shirt and the collar is open and because your breasts are large there just exists a certain amount of open space there.
so you're walking down the street, feeling this cold glob drip down and make your bra wet (and sticky!) and you finally try to discreetly wipe it off, even though it's pretty much all melted and stuck to you.
yeah, it sucks when that happens.