The Number One Reason Why That Happens

(I’m a biology graduate. I’m at the seaside with my five-year-old daughter, trying to teach her how warm-blooded animals regulate their body temperature.)

Me: “So, have you noticed when you went into the water it felt freezing, but now it feels warm?”

Daughter: “Um… Yes?”

Me: “Do you know why that is?”

Daughter: “Because I peed in it?”