They might make them perkier, though, because the pectoral muscle will get more developed.
Fat loss, overall, makes your boobs smaller.
Both myth and fact. Working out might make you lose fat overall. Depending on your genetics, your boobs could be the first part of your body to lose, or the last.
However, push ups themselves won't make them smaller. In fact they might make them look a bit more prominent by building the muscles in the chest.
edit; Hehe, trustwomen was faster.
Oh ya baby
I feel your pain. I do one armed push ups and my boobs only get Bigger. the women in my family's breasts grow through out their lives, ours NEVER shrink. I have gone up 2 cup sizes from ages 20-29. I am now a 28 DD.
I think MOST women do experiance a Decrease in bust size with weight loss... However considering that Breast REDUCTION is the most popular Plastic Surgery... I would say Most is only about 60%. So for better or for worse, you are basicaly stuck with your size unless you go under the knife. (like I am in 2 months!)
If push ups made your tits small I would be an A cup.