These little bots fly around catching people when they get close enough together in an invisible barrier that shrinks until the people kiss to release it. [It can be very harmless. It can also not be. Sort of depends on who you get trapped with and how you feel about that.]
This feels like a good time to make something up just to play with you, but you'd probably know I was lying and I don't think I could outdo the things they come up with anyway.