I have yet to have top surgery. I doubt many people will ask.
I do have a rather large scar already, 8 inches in length from another surgery that I don't talk about due to strangers creating a pity party, seeing me different after hearing of my medical history, etc.
People haven't asked me about it directly though I've heard they have asked other people about it...my sister would tell her friends who seen it that I was bit by a shark, lol. Another relative had said I was in a sword fight