Yes - there is a "someone else"

I like you with a little pineapple and ‘lil more sauce
I like you well-done and made with a hand’s toss

We meet only late at night, when we can be alone
It’s kind of like cheating, except I am not wearing cologne

My wife suspects that something is wrong
I mean, after all, you are shaped like a thong

Maybe it’s the tanginess, maybe the crunch
Either way, I’ll be thinking about you at lunch