Nudist

Why is it at some point during the toddler years they become nudist?? My daughter has decided she no longer wants to wear clothes. Literally spent all day fighting with her to put clothes on. I finally got her to get clothes on to go out to the bus stop. 5 seconds after coming in from said bus stop she was nude again!!  This one is gonna have me pulling my hair out for the next 15 yrs and then some !!!!