All you have to do is give the mom the history of the thong. White slave owners used to strap the horse thong onto their slaves when they decided to rape them. Since then it has evolved into a fashion item. When a woman chooses to wear a thong, she is emulating the situation and attractiveness of a sex slave and signaling that she is willing to perpetuate the historical energy of sexual slavery and non-consentual BDSM.