Obviously yes, it is wrong. Breasts and long hair are often the two things that makes a women feel feminine (for most) and breast cancer can take away both. It's like laughing at a guy who has one ball because of testicular cancer, not funny either.
yes it's incredibly inappropriate. all of the women on my dad's side of the family have survived breast cancer, some of them have "1 breast," as you say. grow up.
no ive never seen a women with one breast and yes it is mean.
would guys like it if they were made fun of or laughed at becuz they only have one testical becuz of testicular cancer? no
Yes. Cancer is nothing to be laughed at, and neither are the effects of cancer. You obviously don't have enough common sense to realize that. Your question just shows how ignorant you are.