Dad on my 3rd baby (2 months old now). I'm like a WWE ref, I lift up my son's arm to check if it drops without resistance, after walking/dancing for a few minut

Dad on my 3rd baby (2 months old now). I'm like a WWE ref, I lift up my son's arm to check if it drops without resistance, after walking/dancing for a few minutes. Then fast to his bed if so.