Can you please help with the meaning of this saying... want some crackers with that cheese?

Anonymous
I need to know what this means, a girl posted this a Facebook post comment to my man after she wished me happy birthday.
I don’t know if it means anything of concern, I haven’t heard this saying, don’t know what it implies... this girl is someone who is too friendly with my boyfriend in general.
Updates
+1 y
Thanks heaps for clarifying, makes sense now.
He did write some very mushy and sweet words on the post to me for such a macho guy.
Can you please help with the meaning of this saying... want some crackers with that cheese?
5 Opinion