I don’t know. There was a poster on this board years ago who said something like that man offering to shake a woman’s hand was indicative he wanted to rape her or something to that effect. Does anyone else remember this?
EDIT: I believe it was the now banned ZPG_Zealot .
SECOND EDIT: A thread on it here. https://boards.straightdope.com/t/the-zpg-zealot-handshake-thread-party-extravaganza/758713