Salem

If you jump on a Giant Cricket, even if you don't move for hours... you gain no insanity. Zero. I accidentally left 15 bile character on the cricket in my windmill for a whole day, and he had no madness levels. I tried the same with a 50 bile character just to see what would happen and had the same results.

Also happens with the purchasable horse.

No insanity gain while mounted, even while not moving.

Riding a horse IRL makes me a little less insane, but if you get on a horse and sit still for an hour... both you and the horse get bored and at least the horse goes crazy.

Are you absolutely sure this is the common factor and not that perhaps these characters were newer and thus have their 'free insanity' pool still? A few patches ago I made it so you don't gain insanity for a fair bit of time on each character.

Positive, i've had and removed quite a few madness levels on the 50 bile character.