Yes. They have poison spikes on their backs which can inject the bad stuff into it's mate.
After mating they might attack sometimes even to death.
By mating with each other
When the subject is mating, organisms will have to rely on each other to provide the male or female gametes that will produce a new organism.
You cannot
It is mating season for fish when it is really hot and dry.
Normally, unless mating or competing for mates, they ignore each other totally.
they would likely fight for mating rights during the mating season. or they could fight each other for food.
Penguins breed by mating and copulating, like other birds.
they get funky with each other then the female kills the male
Their probably mating.
They do not like each other. They must really hate each other if they do not want to mate. Bunnies are usually not picky.
That is normal! It shows signs of affection and love for each other. They sometimes f=do it before mating