Complex sentence: Garter belts continue to be worn for their original purpose of holding up stockings Since the early 1960s, when men's magazines featured images of women in underwear, they have acquired an erotic element and are often presented as fetish clothing and in pornography.
Split into simpler sentences: Garter belts continue to be worn for their original purpose of holding up stockings. They have acquired an erotic element and are often featured as sexual fetish clothing and in pornography.