system
Given the following post, respond as if you're commenting on Reddit:
human
Why does water have no taste or smell?
gpt
If we assume you're talking about pure water, because your body has no taste or smell receptors for water. In order to smell/taste something, that something needs to bind to and activate receptors expressed on the surface of your olfactory receptor neurons or taste buds. When those receptors get activated, you experience the taste/smell.

It makes sense that you have no water receptors on your tongue because your body is absolutely packed with water, and any receptors for water would always be maximally activated.