If you asked me what the secrets to a happy marriage are, one would be good natured teasing/sarcasm. At least for us, it works. I give no guarantees, mind you. Here are some recent examples...
We were about to go in Giant Eagle.
Jim: "Maybe they'll have some of those things you need in here".
Jen: "No. I just told you a while ago, I've only seen them at Babies R Us. Do you listen to anything I say?"
Jim: "Huh?" (Smiling)
When leaving Target...
Jim: "I just saw those pajamas, like Dylan has, with the feet, in adult sizes!"
Jen: "Why didn't you get some?"
Jim: "He's supposed to look like me, not the other way around".
Jen: "But, we could have used that for our Christmas card".
While sitting on the couch last night, watching TV...
Jen: "So, the Circus is coming to town..."
Jim: (Without missing a beat) "You thinking about joining it?"