There was this couple sitting on the grass, being cuddly and affectionate. At one point, the guy was laying on his back, and the girl was on her knees by his head, so they were looking at each other upside down. Then she leaned over and slowly drooled this giant blob of spit at him. It landed on his face, they giggled, and she wiped it off. Then she did it again, and this time he caught it in his mouth. They did this a few more times.
I was kind of weirded out by this, though I guess it's not technically any grosser than kissing. Spitting just usually has such not-very-friendly connotations.
The oddest part was they didn't give the impression that this was some gross-out or domination game, they acted like spitting in each others' mouths was just some totally normal, affectionate thing.
Well, maybe it is, and I've just led a sheltered life...
Compare and contrast this to a the couple I observed later in the evening while waiting for my take-out order to come up: a gaggle of Marina-ites came up to the door of the cafe, and a girl marched up to the counter and said, "he'd like a turkey cheese-steak" (pointing.) The guy failed to enter the cafe. "Just a second." She went over to the door and the guy shouted, "you didn't even give me a chance to read the menu, why do you have to be such a bitch??" Brief, angry conversation ensued, and the whole group wandered off. The girl at the register stuck around for a while wondering if they were coming back. They weren't.