I wouldn’t be too quick to dismiss unwanted kissing as trivial. Unwanted kissing is also unwanted touching.
Here’s the way it works, guys. When you are introduced to a woman you find attractive, want to kiss, want to grope, or want to crotch-grab, you DO NOT TOUCH. You may offer your hand for a handshake. If she also holds out her hand and connects it to yours for a handshake, that’s fine. For anything else, you must wait for permission.
Virtually every man I know knows this. It boggles my mind that there are grown men out there to whom this must be explained.