Pete, I have not offended by the phrase that you wrote for two reasons:
1 ° - Why I did not understand the meaning of words! ;-)
2° - Even if I had known, I would be to the joke! I like to joke and laugh with friends! :-)
Even here there are some phrases that might be offensive, but we use them affectionately! You can safely use all the phrases you want, just tell me though that means! :-)

A hug, dear Numbnut! ;-)