My "playful" DH is similar, he does daft things that are annoying in the moment - humping me or slapping my arse whenever I bend over the dishwasher etc etc. I think in 27 years I've inadvertently encouraged it because although I often snap "gerrofff ya knobhead", I am usually laughing despite myself. And the bum smacking came from that scene in Only Fools and Horses when Rodney thinks women like an assertive man ("Fancy a curry?") and gets a slap in the face for his troubles.
Obviously I take my opportunities to do it back to him whenever he's bent over or indisposed and he gets annoyed, but has to laugh it off. If you give it out you have to be able to take it.
Recently he's taken to calling me "Boss Woman" to poke fun at me setting boundaries, asking for something or asserting myself and not being a pushover. At first I was irritable and kept telling him not to call me that, which only made it worse. But they're like toddlers aren't they, looking for a reaction - so now I completely ignore it. He's going through an extinction burst at the moment, saying it more and more to get a reaction, but eventually it'll fade out, like stopping a dog from barking by not giving it attention. 😊
After that bloody film Face-Off he did the hand down the face thing to me a couple of times, but he hated having it done to him so that phase didn't last.
If it were me OP, I'd start randomly sticking my finger in his mouth or wiping a wet hand across his lips while he's absently scrolling through his phone or whatever. Then when he says "WTAF??" just say, Annoying isn't it? STOP TOUCHING MY FACE WHEN I'VE ASKED YOU NOT TO.
But to agree with a PP, try also giving him a bit more real affection when you're alone together - after a long time together we sometimes forget that they need intimacy with us too. My DH's behaviour improves immeasurably when I make an effort to be loving and affectionate. I'm menopausal so I mostly want to throw things but I can do it!