My son always has to poop if asked to do chores

He is ten and has been doing this since he started being assigned chores. Twice today, he’s been busy playing and I’ve asked him to take care of a chore. Both times “oh no I have to poop sooooo bad!” Then runs to the bathroom for 15 mins. It doesn’t get him out of doing chores ever so not sure why he does this. He does this at both his dads and grandmas houses too. Anyone else’s kids do this? Should I ask him if he needs to poop before asking him to do any chores?? I’m not sure why he does this or if he even actually poops. via /r/Parenting http://ift.tt/2EiRWDL