I'm pretty sure no one's said they're ashamed?
They haven't, but it's difficult to figure out why anyone would lie otherwise (and I'm talking specifically about outright lies when asked directly, not just telling the asker to mind their own business or failing to mention it at all). What purpose does the lying serve, and if there isn't one then why bother unless they think that cosmetic surgery is undesirable or unseemly in some way?
If the purpose is to get bookings (and money) that they might not have got otherwise, then it's misleading potential customers and some people are uncomfortable with that, partly because it makes things that bit more difficult and annoying for those of us who don't do it, and partly because it could be seen as trying to give themselves an unfair advantage over others which doesn't sit well with everyone.
There are two separate issues in the OP though - any punter who behaves so rudely deserves to be thrown out on his arse and blocked. If somebody pinched and grabbed my tits while asking if they were real he'd get one warning to pack it in and then it's booking over even if he'd barely.got his shoes off.