Never have to wash/get ready again. All ablutions magically taken care of. Just get up, dress yourself and leave the house smelling and looking great.

Or

Never have to piss or shit again. Never have to get out of bed for a piss, never miss a bit of a film/gig/birth of your child/whatever, never have to ask the location of a crapper, it's all taken care of. (shitting is fun so I'll allow just never having to piss again).