Bus boy, bartender, ladies of the nightThe line that gets me is, "it's really all the same".
Grease monkey, ex-junkie, winner of the fight
Walking on the streets, it's really all the same
Sellin' souls, rock n' roll, any other game
Really? Prostitution ("ladies of the night") is along the same line of work as a bus boy, bartender, mechanic, and a rock musician?
I think it all depends for the latter list if they're OK, but prostitution? In Catholic thought, prostitution is an intrinsic evil, in other words, there is no situation where it can be morally upright or licit.
A bartender may be distributing alcohol to non-minors who are not intoxicated. A rock musician can be clean (there are Christian rock bands). Really, anything a relatively moral Christian can do is licit. But no Christian can in good conscience be a prostitute.
This comes from a bunch of places in Catholic writings, but the Bible puts it best in 1 Corinthians 6.
Do you not know that your bodies are members of Christ? Shall I then take Christ’s members and make them the members of a prostitute? Of course not! [Or] do you not know that anyone who joins himself to a prostitute becomes one body with her? For “the two,” it says, “will become one flesh.” But whoever is joined to the Lord becomes one spirit with him. Avoid immorality. Every other sin a person commits is outside the body, but the immoral person sins against his own body. Do you not know that your body is a temple of the holy Spirit within you, whom you have from God, and that you are not your own? For you have been purchased at a price. Therefore, glorify God in your body.
It says in the Catholic commentary (at the link above), "Against his own body: expresses the intimacy and depth of sexual disorder, which violates the very orientation of our bodies." The correct orientation of our bodies (physically) is to our spouse (if married) and to the Lord.
Our Lady of Fatima said that there are more people who descend to hell for sexual sins than for any other transgression. May Our Lady of Fatima, Mother Mary, pray for all of us that we do not sell our souls. Amen.