A childhood belief about rude bits

OK. this is probably the WEIRDEST sex belief you have ever heard! when I was very young, I would have to take baths with my two older sisters. They are about 3 years older than me (twins) and when I was younger I wondered why they had different ... parts... than me and they said that I was the only one in the entire world who had a penis. Now, I never remember being very shocked about this because they probably put it in my mind at a very early stage, so it never concerned me. Ans it was all well and good for a long time. My sisters would always make fun of me now and then even when I was about 10! i don't really know how it neve rgot back to mom and dad! If they had known they would have told me the truth! I eventualy found out the truth when I was in third grade and I saw someone elses equipment in the bathroom. I guess I had never considered how other boys could pee standing up when my sister had to pee sitting down with their equipment that I thought everyone had! Now, when I saw this, I wasn't shocked, it all made sense! When I went home, i told them that I found out and I told my parents too! They didn't get in trouble, because I don't think mom and dad understood me, but to this day they tell me of how they wanted to keep that up until I was a teenager! I'm glad I caught it first!