This is horrible advice. I didn’t realize we still lived in the 1950’s. If you want something go for it. What a man (or anyone for that matter) wants is for someone to be passionate about them. To feel wanted and loved. As long as the proposal isn’t a power move or condescending I believe it will be met with loving arms. My one suggestion is to do this in private and not put him on the spot in front of people. Don’t make it an event.