My boys are obsessed with making robots out of their trio blocks they got for Christmas. Every morning they dump them all out and get busy building.
So, they were building as usual when my 3 year old came running into the kitchen to tell me, "mom, come see my robot! He gots a 'peenuss'!!"

I did my best to laugh on the inside.... I said, "well... that's true. Although, I don't think robots have a penis." He said, "oh. That's funny." He removed the unnecessary part and building went back to usual. Oh, I love boys.