Puberty

...as discussed between my brother and his 8yr old son.

It all started when A told his dad that he thinks the dog is hitting purberty because she snapped at his sister.

And then the conversation continued a few days later...

A: I am getting a unibrow and moustache.
(Remember he's 8yrs old.)
D: Really.
A: Yup. That means I'm starting puberty soon.
D: What's puberty?
A: It's the next stage of humanization.