His eggs have hatched!

So, the other morning as I was getting ready for the day, and the kids were getting dressed, Sawyer comes running into my bathroom naked. "Mom! My eggs hatched!". I was confused on two things and didn't know which one to confront first. I started with the most disturbing issue, him being naked, and what seemed to be him playing with himself. So I asked this little white haired boy, "Sawyer, why are you naked? And why are you playing with yourself?". This clever four year old managed to answer all my questions with this reply, which didn't, at the time, make any sense and continued to confuse me. "Because mom, my eggs hatched, they are gone! I don't feel them anymore!". Being a mom of three boys, I had an ah-ha moment and impressed myself on picking up the meaning of his excitement. To which I replied, "you mean your testicles, (or in his language, his coconuts)?", "yeah, they're gone, they hatched!". "What did they hatch into? Should we be looking for something flying in the house?", I said. "No mom, they just hatched, they're just gone". Needless to say, I had my fun and explained to him that these eggs of his are not actually eggs, even if they feel like little eggs to him, they are called testicles. And they did not hatch, they just hide up inside when you're cold. He stopped for a few seconds, staring into space while this ran through his head, and then said, "oh", and ran back to his room to get dressed. Later that day I asked him if he found his eggs. "Noooo, they're still hiding, remember?" he said. That's life with boys. :)