Babies often tug on their genitals, just as they tug on their toes or ears.
Boys often find their penises accidentally, possibly during a diaper change around six to seven months of age and become curious (just like their fascination with other parts of their bodies, such as fingers, toes and ears).
Girls often don’t discover their vulva (female external genitalia) until about ten to eleven months of age.
Potty training can be another time when there is curiosity about the genital area. Boys will play with their penises. Girls may even insert things into their vaginas. But at what age is masturbation becomes normal?