Biting off a piece of lipstick

I would strongly recommend against this, while it tastes good the texture is absolutely disgusting.

Chalk, too. It’d probably be disgusting, but I want to feel the texture in my mouth as I chew it.

Surprisingly, chalk is not that bad in terms of taste or texture as it just tastes like dry rock. If you are that curious make sure to get a new piece of uncoloured chalk and eat only a small amount.