person A: My wife and I have been together for 5 years
person B: Gratz. What's the secret?
person A: Just staying faithful.  That girl is so loyal I love her so much. 
person B: Good to hear_comma_ glad you guys are happy!
person A: Hey thank you!  She would never cheat on me and I have faith in that.  I would NEVER EVER do the same.