My dad once told me during a conversation when I was 11 years old:

"Any man who pats your shoulder or touches any part of your body, you need to be careful.
He will try to test by touching your shoulder, and if you don't react at all,
he will gradually try to touch other parts of your body.
So if a man touches you, you must respond immediately and resist.
When he told me this back then, I didn't quite understand it.
Only as I grew older did I realize my dad's good intentions."