You shouldn't write "to use a prostitute*. A prostitute is a person, you don't use people.
And no, if I can't have free sex like all humankind for ages to reproduce, I'd rather not have sex
Semantics, you use their sexual services.
If you're good at attracting women, I can totally understand why you would feel that way. But a lot of guys aren't very good at getting women, maybe they're losers or handicapped, either way they have sexual energy they need or would like to burn off with another person.
Maybe you wouldn't want sex if you had to pay for it, but its a cruel system to make criminals out of people for simply wanting sexual attention for money. Especially when we have consenting participants on both sides.
OT: In the right circumstance, I'm pretty sure I would be open to paying sex. I don't think I would feel great about doing it, but its certainly possible.
On a side note, I'm in a relationship. But in the past I haven't been opposed to giving stripper money to rub her ass on my penis. If I could enjoy that I think I can learn to enjoy the actual penetration.