The sign of an economic downturn often.
Sometimes it is desperation, sometimes it is the sexual attention and verification that you are very attractive.
It can be the money power swap.
It can be boredom, lack of self-worth, inflated self-worth, pocket money, a sexual addicts dream, easy money, hard money etc.,
No all prostitutes are alike, some consider themselves high class, some walk the streets. Some are wealthy in their own right, other’s are stricken with poverty.
Some feel they have power in the situation, but the ‘john’ thinks he has power too. So, all the power is misleading.
Some adult movie actresses fund their flagging income by becoming prostitutes as not many earn that much anymore.
There are always variables in any situation, plus, on an individual level there are also many varients.