Folk
Some people on here make it sound like it's something a man does to a woman and that a woman accepts reluctantly in the hope it'll turn into something else.
Yes, this always baffles me. Hello, lots of women like to have sex without necessarily wanting a partner out of it!
It can be especially convenient when you are a single parent - you get the adult company (and the sex, obviously) without having to worry about introducing them to your DC or worrying about whether they would be a potentially good SP.
OP, I think the only way to clarify this is to ask the man in question how he imagines your relationship scoping out. Does he just want a quick hook-up and "see ya later" or is he envisaging a friendship with added sex? You will only find out by asking him.
I personally would always choose friendship+sex, because part of what gets me attracted to people is having a conversation with them and some sort of shared experience.
If you haven't had a set up like this before, think carefully before you agree to it. Some women do find that they end up developing the feels after having sex (probably oxytocin driven) which can be painful if they then want the existing relationship to turn into a love relationship but the guy isn't into it.