Why would a guy keep touching me & invading my personal space when I've told him not to?

I don't understand I've told him multiple times not to hold my hand, or to get too close to me or touch me etc. He still doesn't get it? He's always finding ways to invade my personal space or just touch me somehow.

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Like what if I take some legal action? He's not scared of that too?
Why would a guy keep touching me & invading my personal space when I've told him not to?
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