It is possible for someone else to pee your pants

While at the primate house at the zoo, Cam and Jaycee were sitting on a bench while the rest of us were mesmerized by the orangutans. All of the sudden, I hear "ugh, Jaycee!" I turn around and Cameron is standing up with a large wet spot on his crotch. Unfortunately, I only had a change of clothes for his sister. He had to walk around the rest of the day looking like he'd peed his pants! Wish I had a picture to show!