?

For example...
1. You manipulate a person's emotions, making them think you love them, and then you use them and abandon them.
2. You offer money in exchange for this kind of service to someone whose close people are in dire need of it.

1. It might cause some discomfort, but there's no rape involved. If the second partner doesn't have enough social experience to recognize this kind of behavior (and it's usually obvious, I've known many such people in real life), then that's their problem. It's simply a mutual desire for sex.
2. I'm not a supporter, but I'm not against prostitution either. If a person is willing to trade their body for some benefits, then it's their conscious choice.
In any case, as long as there's no rape, adults decide for themselves whether to reciprocate love, feigned feelings, or for money, and I don't strongly object, as long as I'm not involved. But if there's rape, then a place in hell is reserved for the perpetrator in any case.