>some vegans need to constantly talk about their veganism as a way of suppressing their own uncertainty about their decision.

I met up with some friends in a park recently. It was hot so I suggested ice cream and one vegan dude I'm not that close with comes with me to get it. As we are walking back I notice he is eating an ice cream which is weird cos he's vegan. Without me prompting he says

"Oh damn, I forgot I was vegan"

Then he goes on a monlogue about how he's been feeling so good since he became vegan and he thinks it's great but he sounds totally unconvincing. Like he doesn't believe himself. Later he pulls some pre made vegan food out of his bag and slowly starts eating it. Turns out his girlfriend packed it for him. I talk to some friends about it later on and they inform me that he regularly cheats and pretends to himself it was an accident. Dude is probably malnourished and under the thumb of his vegan girlfriend. It's kind of sad.