If I had to guess (just a guess, I don't really believe these things.) - Lowering birthrate; people may be less likely to have a family and kids if the primary

If I had to guess (just a guess, I don't really believe these things.) - Lowering birthrate; people may be less likely to have a family and kids if the primary driver for these things (sex) is already taken care of. - Higher STI rate (regulation might help here). - More isolation; people are less likely to go out and mingle if one of the reasons to do so is easy and transactional. - Wealth inequality; I believe men are more likely to pay for sex, and women sex workers tend to make more. So, money will move from one gender to the other unidirectionally. This may result in wealth inequality if sex work becomes wide spread.