(A customer holds an  open envelope with a prepaid label on it.)

Customer: “I don’t know how to ship it or anything.”

Me: “Well, basically, you’re gonna want to seal it up and give it to me.”

Customer: “How do I seal it up?”

Me: “You peel off this strip here”.

(I point to the peel-off backing of the adhesive strip.)

Customer: “But how do I peel it off?”

Me: “With your fingers?”