A sale representative stops at a small manufacturing plant. He presents a box of cigars to the manager as a gift.
"No, thanks," says the plant manager. "I tried smoking a cigar once, but I didn't like it."
The sales rep shows his display case and then, hoping to clinch a sale, offers to take the manager out for a round of drinks.
"No, thanks," the plant manager replies. "You know, I tried alcohol once, but didn't like it.