No problem for me - have done it numerous times. I find the checkouts are usually so bored they hardly notice what they pass under the barcode reader anyway.
There was one exception to this when a barely legal beauty in the local chemists (drug store) served me and part of my shopping was KY - she smiled up at me and asked "Party time?" Now that brought a flush to the cheeks, but then again perhaps she thought I was homosexual !!!!

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Bucksman
An Ordinary Englishman