Since nobody had ever asked me: "Hey Samurai! Let's go out for vegan salads and almond milk. It will be wild. Wanna come?"
Challenge? I'd never challenge anyone on something that could result in major blood loss. If you choose to ignore the warnings, I take no responsibility for the outcome, positive or negative. We all choose our own path.
I shave in the morning, and don't drink before lunch. Accordingly, I have never shaved under the influence. If I was hung over, I would stay in bed and not shave at all. The only reason I shave in the evening, sometimes, is if I have a date. Again, common sense would preclude drinking beforehand. Maybe it was because you were all mellowed out and relaxed? Chamomile tea might have the same effect, and be less problematic afterwards.