No we should NOT ban them. It's nothing to do with you me or anyone else if somebody chooses to endanger THEMSELVES.
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I was telling a girl in the pub about my ability to guess what day a woman was born just by feeling her boobs.
"Really" she said, "Go on then.... try."
After about 30 seconds of fondling she began to lose patience and said, "Come on, what day was I born?"
I said, "Yesterday."