Its not so much the fact he is male its becouse ive seen him get her up he just lifted up the bed and took the quilt off before telling her what was happening which he cant anyway as he only speaks bits of English and seems to me very ruff and quick when washing her like he was in a race he is more concerned about ticking the boxes than careing for the peorson
Then what you feel sounds more like the carer’s manner than the fact that he is male??
Like previously stated though if you are uncomfortable with your wife having a male carer due to her age....then my advice is to discuss this with the manager.
In my opinion as long as your wife is treated with respect, dignity and care, then it is irrelevant if the carer is, male or female, but that’s just my opinion, you must do what makes you feel absolutely comfortable.