Some years ago, I read a news story about Afghanistan. There's some super-repressive sub-culture there that doesn't allow pre-marital sex, but it also doesn't allow flirting or, apparently, even MEETING the opposite sex. It seemed obvious that they were attempting to prevent pre-marital sex, but in the process, they disallowed even conversation or being in the vicinity of each other. One side-effect was unexpected, at least by me. With a complete vacuum of women in any manner whatsoever in their lives, some of the men were paying some adolescent (teen) boys to dress up as women and, basically, pretend to be women. The boys got attention and got gifts. They also got molested. Rather than provoke outrage, it seemed like their society was used to it and didn't see any problems with it.
I'm not saying this EXACT thing happens whenever ALL sex is disallowed and marriage is not allowed (de facto like in Afghanistan or de jure like the RCC clergy), but there certainly seems to be correlations between people doing stuff like this and marriage and every single form of sex is disallowed.