Is it true that boobs can get hard?

well to my experience the boobs didn't get hard but like the nipples got harder than they were. I mean that when the girl got a bit horny and wet, but after the nipples got hard, the girl and I stopped doing anything so it returned to "normal" anyways that is what I know, anyways you might want to put this question under the category of sexuality and not the current one. :D

Nipples can get erect, but that's about it. And it doesn't necessarily happen all the time, like it would with a penis. Mine seem to respond more to temperature than stimulation.