Like Father - Like Son

I was kicking back on my bed with my other half.
 When my son jumps up on the bed buries his head in my chest, starts shaking his head between my boobs and makes noise while he does this (sorta like when you do it on your lips with your finger). 
I start laughing and asked my other half if he saw that. 
He said "no" and I explained what he had done.
 He just starts laughing and all I could think to say was ... "like father like son"