Because parents don't want their kids to grow up to be tramps
I beg to differ. I mall-walk every day at lunch and I constantly see little girls, some as young as 10 or so (near as I can tell) who are totally slutted out -- short short skirts, training bra straps under torn or short-short t-shirts, etc. Invariaby, these girls are with their Mothers -- usually late-20s to early 40s -- who don't seem to care and are helping buy these slutty outfits (some stores only sell these types of clothes.
I don't think I am a prude when I say that little girls should NOT be dressed like the tramps on MTV last night. It is not fair since it robs them of their youth.