I take exception to the claim that being against casual sex is to be anti-sex in general. Having a single, dedicated sexual partner as a spouse is plenty sufficient to satisfy the human need for sexuality, and can provide a deeper, richer sexual experience from mutual knowledge, trust, and practice.

I am staunchly against sex work of all stripes. It's degrading, it frequently brings out the ugliest sides of humanity. Sexual motive is among the first considerations in a murder, and the 'profession' attracts crime regardless of legality. Sex work is actively deleterious to the human condition. Standing in opposition to sex work is, in fact, standing in favor of safe and positive sex.

While I agree that the law should, in general, stay out of the bedroom, money IS a matter of, indeed, a direct appendage of law. By bringing cash into sex, you have invited the law in, and saying that a commercial act so tied to health and public safety should be unregulated is preposterous. Would you disband the FDA because they won't let Joe Entrepreneur start a pufferfish sashimi shop with no regulation or certification?

Edit, copied from below to support the first paragraph:

Studies I've seen cite 20% of married men have committed at least one act of infidelity, and that the current percentage is almost twice what it was in the seventies. That seems to me like the vast majority of couples get along just fine in a monogamous relationship, and that culture has more to do with infidelity than primal need.