I frequently see posted here that parents get drunk or high once the kids are asleep. Not just after a drink or two, but pass out inebriated. I am also not talking about one parent getting plastered and the other is the 'designated caretaker' for the night.
To those who say you can function fine while high/drunk, stop kidding yourselves. If you and your partner get wasted, you'd better have a responsible and sober person taking care of your kids for the night!