What it often means
- Relaxation: when he dozes or sleeps, his muscles loosen and the tip of his tongue slips out between his teeth.
- Interrupted grooming: a noise distracted him mid-lick, and his tongue stayed where it was.
- A smell to analyze: after the open-mouthed grimace that follows a good sniff, the tongue may stay visible for a moment.
- The shape of his head or teeth: a flat face, a short jaw or teeth missing after extractions leave the tongue less well held.
- Less often, a problem: dental pain, a tongue ulcer, a foreign object, nausea, or trouble breathing.