How do you find out about a man's porn viewing habits and potential for porn-related ED before/while you're still deciding to have sex with him?

Primarily, what's the best approach so the conversation doesn't imply I'm wanting to immediately escalate sexually. Granted, if he takes it as an opportunity to display lvm behavior, farewell. But I'd like to be as strategic and clever as possible, hence the post 😁

In my mind this conversation would be happening sometime in the first 8 weeks. The guy would have had to make it this far. Or is it best to vet this really quickly, in the first couple of weeks? Is it enough that he gets hard while making out, that we can assume he isn't a porn addict?