Listen, he's only taken you out once and now instead of taking you out again, in order to get to know you, he's offering you a massage which he knows, because you are so naïve, that you will end up having sex or blowing him or something. So: Why don't you ask him to do something with you outside of either of your homes instead of going for a massage?
You don't even know this guy and for all you do know, he could be married or have a girlfriend which of course, if he does have a girlfriend it means he only wants you for sex. Him steering the conversations towards sex so early, it pretty much tells you what he's after even if he is actually single. Don't expect to have a relationship with him just because you have sex with him... particularly so early in your introduction to one another. Get to know him and see if he has true intent about you. (doubtful)
Keep your interaction with him to outside and in public so that you're not fooling yourself or letting him fool you. If you do have sex with him, make sure it's at his house, if he'll he'll have sex with you there, its more likely he's not married at least.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion