Let's face it, Hellboy 2 isn't exactly a great movie here. Sure it's campy and has some of the fun of the first movie, but it's not the original. I would imagine something more along the lines of a romantic movie if I wanted to get into someone's pants.
Me personally I'd request an STD screen before moving further as well as schedule myself for one. It gives you a few more days of breathing room. Do the date, leave the overnight bag at home, keep it simple. It isn't like you have to go further or not as far as you did already. If he's OK w/ that for a bit then I'd imagine he should be OK w/ waiting a bit longer for a piece of the cookie.
At some point you need to breathe and differentiate between body chemistry and relationship chemistry. Figuring that out sooner rather than later is good.
"Well, then," the Cat went on, "you see a dog growls when it's angry, and wags its tail when it's pleased. Now I growl when I'm pleased, and wag my tail when I'm angry. Therefore I'm mad."