Marijuana, the most often used illegal drug in this country, is a product of the hemp plant, Cannabis sativa. The main active chemical in marijuana, also present in other forms of cannabis, is THC (delta-9-tetrahydrocannabinol). Of the roughly 400 chemicals found in the cannabis plant, THC affects the brain the most.
Cats 'vibrate' when marking territory-spayed cats can also 'dry' spray. Spayed male cats urine doesn't smell. They swish their tales as a sign of annoyance or anger. If the tip of the tail 'trembles', it's quite often a sign of being 'unsure' about something. Source(s): Cat owner.
What does it mean when a cat flicks its tail against you? Answer Wiki. I have one cat that does this when she wants some affection (back scratching, ear rubbing, petting, etc). if she doesn't get it, she'll escalate to tapping you with a paw, then gently (she knows the difference!) using you as a scratching post.