First time seeing or wearing a speedo

[lapswimmer]

I always took for granted that kids were aware of a man's anatomy and wore my bikini cut suits to our neighborhood BBQs and pool parties. During one of these parties I was relaxing on my back on a float in the neighbor's pool. The rest of the adults had moved to a table and near the grill leaving just myself and one of the neighbor's daughters in the pool. She was pre-teen at the time. Without any notice she swam over next to me and laid her hand on my bulge and asked me "what is this?" i damn near inhaled myself, but remained calm and pulling back just told her that that was what all boys have. It was an innocent situation and I did not tell her parents as I am sure it would have gotten her in trouble, but I did retreat and join the other adults pretty quickly.