A warm smile slid across his face. It occurred to him with alarm that he had lost the train of conversation a while ago. Okay. Topic... default- science!

"I don't have any of the things I've built here, or at least readily accessible here, but I should show you the P.R.L.," he said. "It's a medical laser I built in one of my old labs and probably the best thing I'll ever manage, but I hazard to guess a genius like you could take it apart and put it together better than it was."

Second default- innuendo! "And as for your hands, you'll just have to show me sometime."