How to get him to grab your waist
it would be nice if more guys did that to know
Put your arms around his neck and look up at him, it'll be his natural instinct to put his arms around your waist. If that doesn't work just grab his hands and say "These go right here."
tell him it's one of your erogenous zones. too bad we don't come with manuals :)
He'll do it if he wants to.
Lots of guys does that lol but anyway just tell him or grab his hands and direct them there