How the hell do you not laugh at something your kid does that’s wrong but so freakin funny?

My sons not allowed to run or play on the couch. So after he was goofing around with his dad and decided to run around on the couch as were telling him no. So we give him a small swat on his leg to get him to listen. He begins to fake cry and then he can’t stop himself from laughing in between cry’s and I swear I couldn’t keep my composure for s%#*. We began to laugh hysterically and so does our son which makes us laugh harder.

I’m going to fail as a parent because I can’t keep a straight face when I discipline. 😂