“When girls head for the stars, they are clad in bikinis, or skintight bathing suits made of cellophane or some other flexible and transparent substance. Even when they get out of their space gear they sport bare legs and bared midriffs. So who is it that would like to look at girls with very little clothes on? Why boys of course.”
Paraphrased from a segment of the book MECHANISMO (1978) in which the author, Harry Harrison, discusses the reason for the differences between the space gear worn by girls and boys in the old space opera pulps.