Wow I had no idea slugs went into people’s homes like that
Yes, they fucking do, and it’s annoying as hell. Also, super gross when you step on one barefoot in the middle of the night.
in which kind of regions? Stealth slugs are new to me

Much of Britain, certainly.

They can get through a gap of 1-2mm (about 1/32 - 1/16 inches) through cracks round door frames, along the holes for water pipes, in tiny cracks between bricks or concrete.

They have an amazing sense of smell and are especially fond of cat food or that tiny bit of lettuce that fell underneath the fridge.