Are you assuming that this happens strictly for the sake of sex?
I have traveled on business where sharing a room with another man was required.
Would you have that outlawed, and force companies to bunk up male and female employees?
The rest of the things mentioned happen on public, I don't have a problem with laws that regulate public behavior. I have a problem with laws that regulate private, consensual behavior.
The perverts applaud your efforts at tolerating their evil. There are drug users and pushers, prostitutes, johns, and pimps, bestialphiles, pedophiles, and necrophiles applauding your unconservative stance, too.