What is Even Though You're On A Diet, Doesn't Mean That You Can't Look At The Menu?
1.
Meaning that even though you already have a girlfriend doesn't mean that you can't date someone else.
Bob: Dude look at those hotties man!
Mike: But I already have a girlfriend
Bob: Even though you're on a diet, doesn't mean that you can't look at the menu.
Mike: Oh OK then.
See
