I dutifuly did a search of the forum on "opener" to see if there are any posts addressing this.
As an adolescent, in the 1960s, I remember a corny joke: "What do you call a drink with vodka and prune juice?" Answer: "A can opener."
Jack has such a wry expression when he says that he is a poor cook, but is pretty good with a "can opener".
What is the agenda, if any, behind such a remark?
For years I was a vegetarian, before old age and health problems forced me to eat meat. My stepson one day brought home a fellow highschool student whom I knew was openly gay (but he did not know that I know.) Somehow the topic of vegetarianism came up. I asked him, "Do you eat mean?" He answered, with a wry smirk, "Sometimes."