once or twice

My young Secretary was telling me a story today, that she had great sex last night with her boyfriend. But when they were finished, she looked in the box of condoms, but there were only six left out of twelve, so she asked her boyfriend what happened to the other five condoms?
He told her he’d masturbated with them.
“Have you ever done that?” She asked me.
“Eh..Yeah, once or twice” i said. “You mean you’ve actually masterbated with a condom on before?”she asked. …”Oh, sorry” I laughed, “I thought you were asking if I’d ever lied to my girlfriend before.