That is not what Chris has trained Marlo to do but, on the other hand, handholding. 

It is also true that walking a pace behind the person you're on a date with is the kind of thing that gets you weird questions, but mostly the reason is handholding. 

Chris is pretty sure that you are allowed to hold hands with your something when you are in Central Park!

It'd be very strange if you weren't! 

Maybe there can also be hairpetting?

They might want to find a bench and sit down, but yes, there can! 

Hairpetting! Snuggles! Public displays of affection!

"I think," Chris says, "I understand what soft-world people get out of being kinky."

Chris's hair is very soft. And that is an excellent face he's making. "Hmm?" 

"Cuddling on a park bench feels very forbidden and deviant. It's exciting."

That's so cute. Marlo kisses him, first on the cheek and then on the mouth. "I love you." 

"I love you!"