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Reciprocal altruism requires that animals remember which individuals have and have not shared.
Sex Hormones
Biologically active chemicals that regulate the development and functioning of reproductive organs and sex-specific characteristics in animals, including humans.
Testosterone Levels
The amount of testosterone, a primary male sex hormone, present in the body, which influences various bodily functions including muscle mass, hair growth, and sexual function.
Sexual Behavior
Actions or practices related to the expression of sexuality and sexual attraction.
Asexual
An orientation where an individual does not experience sexual attraction towards others.
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