It means having you are having regular sex.
This isn't an idiom - it's talking about some animal with their tail held high, flying behind them.
There isn't an idiom "dog's tail." There are several idioms about dogs and tails, but I'm not sure which one you're thinking of.
If you've ever watched a dog chase its tail you have noted that it expends a lot of energy running around in circles without achieving a worthwhile objective. What is the dog going to do after it catches its tail? It means that you are wasting your time and effort in a useless pursuit.
It means fled, or ran away. This is a straightforward idiom derived from seeing the tail of an animal as it runs away. To "turn tail" is to turn around and leave, which would typically be the response of a weaker animal to another, stronger animal.
It's not an idiom - it's a pretty good vivid description of someone trying to pretend to be something they are not. Imagine a peacock with fake tail feathers attached.
It means they are getting ready to MATE
The idiom originally referred to playing card games in Old West saloons, more specifically the game of faro, or more rarely poker. The primary slang term was "bucking the tiger." In modern use, the idiom has often been applied similarly to "pulling the tiger's tail," meaning deliberately antagonizing a person or group where this could be considered risky.
The basic idiom of furry art is the way human type characters are portrayed with animal parts. It may be an actual part like a tail or it may be their voice or behaviour.
The idiom "got the tiger by the tail" means that you have responsibility for an enterprise that is considered too difficult, or challenging, or potentially harmful. If one has a tiger by the tail, he has limited control and considerable peril.
When a cat twitches their tail, it usually means they are feeling agitated, annoyed, or anxious. It can be a sign that they are getting ready to pounce or that they want to be left alone.
If you mean 1: head 2:tail 3:head the probability is 1/2 x 1/2 x 1/2 = 1/8. If you mean only that you want the heads and tails to alternate, that is, you mean the above or tail, head , tail, the probability is 1/8 + 1/8 = 1/4.
the wire may be broke some where or their is ground issue leading to the tail light