There's more subtle ways than the one's you've described:
> You cold call him (just to ask him a quick question) on his cell, or even better, Zoom, at his home, when his woman is home. And he accepts the call.
> He likes to walk or bike at lunchtime, or Saturday mornings. And so do you.
> (Pre-pandemic) His woman is on a business trip, and he has the kids for a few days. You ask if he needs help feeding them/picking them up at school/sports. He says, "That'd be great."
> You ask him for financial/investment/tax advice. He offers to help by going through your shoebox of statements/receipts. Alone. Over wine.
> You invite both of them over to your place to check out a new piece of furniture you bought. You tell her to dress casual. But then you do yourself up in your nicest clothes and your best haircut. He notices the contrast.
> You pay him better compliments than she does.
> You tell him, nonchalantly, that you would kick her ass in a fight.