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Adrenalin.
The Total Gym XL uses your own body weight so it can be used by anyone, and many females use it successfully. The Total Gym can also be used for pilates.
Decreased longevity in response to current reproductive effort has been used as a measure of the cost of reproduction.
The perineum describes that part of the body.
Pheromones are used by insects to communicate. Sexual pheromones allow males to track females. Attack or alarm pheromones tell bees to join in the attack on an enemy.
The word guys is not supposed to be used in formal language. It's a casual word for informal speech. It can be used for peers or for younger persons. Guys should not be used by seniors speaking to subordinates. Guys may be used to describe a mixed sex group of males and females.
the males compete to fertilize
Females (peahens) are brown and dull compared to the male. Males (peacocks) are quite gaudy, with a flashy eye-spotted tail used in displaying to females and rival males.
to calculate why males are better than females
It is used for both males and females.
Adrenalin.
The word "pig" can used for both males and females. If you want to be detailed, males are boars and females are sows.
No. Males and females can use slang. It is a form of spoken language, so it can be used by anyone.
by the single pair of sex chromosomes
"Yes. The Bowflex Sport can be used by both males and females. It offers sixty different exercises. Some are probably more geared toward males, while others are more appropriate for females."
They used to be called stewardesses, and all were females. Now, they are called flight attendants who can be males or females.
"bibliotecario" means "librarian" in English (this is used for males). "Bibliotecaria" would be used for females.