I definitely prefer to have someone administer an enema to me. I just prefer to follow their instructions. Male of female.
I find all I have to do is assume a position and let them do the rest.
I don’t mind what position they have me assume, though I prefer to be on my stomach, then in the knee- chest position.That position affords other things such as abdominal massage or ( male) having the scrotum played with, having an erection slowly stroked. If shots are needed or a temperature check, it is a suitable position.
Other benefits of a caregiver giving it is that they can manage the bag height, flow and the nozzle insertion and assuring it stays in ( as sometimes the nozzle when lubricated,
occasionally tends to slide back out.)