Escort services in Boston, MA, USA?

Hi, are escort services legal in Boston, MA ????
If yes, then, is there any particular law stopping F1 visa holders from buying this service ? Or, are F1 visa holders legally eligible and allowed to buy these escort services ?

Thank you.
Update: Thank you for the replies. From your replies, i have got a few more questions ? What is an escort service ? And how different is it from prostitution ? And what are those "behind the scenes" dealings that you mentioned about ? thank you once again.
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