I hope the next time he does a tinkle he shakes himself off to make sure it's all gone, and then because he thinks he's being smart he does another shake just in case, but then when he zippers himself up, there was a little bit still left and it dribbles into his pants. Not enough for anyone to notice it on his trousers but enough for him to feel a damp patch for the next 10 minutes and to think "oh, I'm a grown adult and i can't even do a wee properly" for the rest of he day.
I hope the next time he does a tinkle he shakes himself off to make sure it's all gone, and then because he thinks he's being smart he does another shake just in case, but then when he zippers himself up, there was a little bit still left and it dribbles into his pants. Not enough for anyone to notice it on his trousers but enough for him to feel a damp patch for the next 10 minutes and to think "oh, I'm a grown adult and i can't even do a wee properly" for the rest of he day.