So... just how would you define "molesting" a baby?

Babies obviously need to be picked up, carried and hugged even when distressed and screaming. And you also have to change napkins and clean their privy parts, even when the baby is distressed and crying - commonly because the privies are in need of cleaning to begin with.

Where would you draw a line where touching a baby is too "sexual"? Assuming it is nothing violent or hurting, of course.