You’re trying to shun people’s right to ask silly questions based on your own moral compass. I understand what you’re trying to say, but your perspective is something I don’t personally agree with. I don’t know what world you’re describing that you grew up in, but my grandparents wouldn’t be offended by this poll in any way, shape, or form. This sounds uniquely personal.
I was born in the 80s. It's more of a gender thing for me. I would never ask a girl how often she showers. A guy? Heh, most of my friends (male) wouldn't care if I asked them that. I definitely wouldn't ask a woman that question, lol (friend or not).