Don't know about anyone else, but the most common thing my partner and I do when we're in love is talk and play retarded games.
Talking, which can be interpreted as mutual damage, is "damage", but each other know that it is a joke, often for a sentence or two to say half a day. For example, if you see a dog on the side of the road, you can say, "XXX, you see you're hanging out again! The dog's legs are so happy to see you," he said. ...... Often, such a small topic can be said together. Although occasionally said too much to cause one party unhappy, but as long as the other party in time to stop mouth say two good words, immediately can be reconciled again.
Playing retarded games, in fact, the game itself is not retarded, just in the eyes of others look like two people like retarded. For example, once I went to the supermarket to buy snacks with my partner, she especially love to eat pork rinds, bought two bags, on the way to her pork rinds snatched over the request to play a game with her, that is, jitterbug on the previous very hot that finger turntable, I have a hand holding the pork rinds, a hand in the top of the non-stop turn, she said "stop", I will stop. If it stops on the pork rinds, then I'll give it back to her, and if it doesn't stop on it, then both bags of pork rinds will be mine. She agreed to play with me even though she knew that finger spinning was an impossible game to win. And so the two of them played from outside the school to inside the school, and I kept up the rascality and she kept trying to find ways to win. It was a very simple game, but the two played and laughed together and didn't feel bored at all.
I just cited my own example, in fact, the stage of love, there are a lot of things can be done, many times just two people holding hands walking under the street lamp, also feel particularly happy. Probably love is like this, turning every little ordinary thing into a fun game.