You think it's humiliating, degrading, undignified, to let another person wipe your behind. When you can't wipe yourself, of course someone else does it for you. There's no shame, and without shame, there's no humiliation. If you don't believe me, believe the Sun King. In periwigs and silk brocade, Louis XIV's noblemen competed for the privilege of tending to his personal hygiene, even though he was perfectly able to do it himself.
Personal assistance can be a grand luxury.
It brings physical sensations that are not the least bit unpleasant. If you'd open up your imagination, you'd probably come to envy my morning routine. But, you say, you're not me. You're not Louis XIV either. OK, I'll give you that.