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Must be flying over my head; what's so awful about it?

That's what I figured. Do not get that in my head at all when I think of "munch on me".

I didn't really think of it either until it was hinted at, to be honest.

Likely a cultural thing. I imagine it would have stronger connotations in British/Australian context.

Munch is used in various ways to describe oral sex, e.g., "carpet muncher", which refers to "eating out" a girl.