Bednobs, we are talking seriously disturbed people here, they don't understand reason, they often have no concept of reason, would you find it acceptable to forcibly hold down a confused lady, forcibly remove her clothing and wash every part of her? That is the issue here and there is no exaggeration!
Male carers often find it very difficult to get jobs in care because of this, if a female does not want a male carer she does not have to have one.
The dementia side of thing is a little easier because many dementia sufferers have no objection and neither do their families but some do object. We always have male and female staff on duty and never will two males work together on the unit as this would limit the care to male care. two women can work together as this never presents a problem.
I have never known a situation in the homes where I have worked where that choice has been taken away from a resident.