Oh yes, only once so far. I think over 2 years ago, I asked a friend's friend in a club what he was wearing. The next day, I bought it - Loewe Solo. I don't use it much now.
Otherwise, I do recall, in my early teens, finding out about CK One because a close friend was wearing it. I think it took me a couple of months of saving my pocket allowance for school just to get it.
Nope, never happened. I don't know many people, male or female, who wear perfumes I'm not already very familiar with and/or not interested in. And I rarely smell frags (let alone quality frags) on strangers here.