We all accidentally peed our pants at school. Whether it was because the teacher wouldn't let you go to the bathroom, or just because kids have terrible bladder control. Whatever the reason, it's an embarrassing situation.
So when Twitter user Lucinda Sowards got a call from kindergarten saying that her little sister had an accident, her dad decided to make things a little less embarrassing for her by wetting his own pants. Presumably with tap water, though Sowards didn't specify.