When Donna asks Ann, "Where can I get lube that is healthy to eat?", Ann replies, "You should never eat lube". However, water-based lubes are edible. They are, indeed, quite safe for human consumption. They are not nearly as safe to drink. But, in small quantities, they are perfectly safe.
When responding to the fake old people questions Ann states that you "have to be under 40 to ride this train." However Ann used to date Chris and it was stated previously that Chris is in his 40s.