I am a nursing student and have been working as a Nurse's Aide for just over one year.
To date I have helped care for just over 500 patients.
A grand total of three (3) have specifically asked for a female aide to help with "personal hygiene."
However, I've had six family members say that their loved one would prefer a female, and after said family member has gone home, the patients all profusely apologized.
I have had around 15 patients (both male and female) inform me that they actually prefer a male (I don't ask why, so don't ask me).
The vast majority seem to be oblivious as to the gender of their caregivers, they seem only concerned that they are getting proper care. This is how it should be.