Now, take a look of testosterone and the human bodies. 

How testosterone affect the life and thus the work.

Therefore, the leaders of two religions, Christianity and Islam. you should do more research on this before blindly following the fairy tales created 2000 and 1500 years ago.

Males

In men, higher levels of testosterone are associated with periods of sexual activity.^[71][72]

Men who watch a sexually explicit movie have an average increase of 35% in testosterone, peaking at 60–90 minutes after the end of the film, but no increase is seen in men who watch sexually neutral films.^[73] Men who watch sexually explicit films also report increased motivation and competitiveness, and decreased exhaustion.^[74] A link has also been found between relaxation following sexual arousal and testosterone levels.^[75]

Females

Androgens may modulate the physiology of vaginal tissue and contribute to female genital sexual arousal.^[76] Women's level of testosterone is higher when measured pre-intercourse vs. pre-cuddling, as well as post-intercourse vs. post-cuddling.^[77] There is a time lag effect when testosterone is administered, on genital arousal in women. In addition, a continuous increase in vaginal sexual arousal may result in higher genital sensations and sexual appetitive behaviors.^[78]

When females have a higher baseline level of testosterone, they have higher increases in sexual arousal levels but smaller increases in testosterone, indicating a ceiling effect on testosterone levels in females. Sexual thoughts also change the level of testosterone but not the level of cortisol in the female body, and hormonal contraceptives may affect the variation in testosterone response to sexual thoughts.^[79]

Testosterone may prove to be an effective treatment in female sexual arousal disorders,^[80] and is available as a dermal patch. There is no FDA-approved androgen preparation for the treatment of androgen insufficiency; however, it has been used as an off-label use to treat low libido and sexual dysfunction in older women. Testosterone may be a treatment for postmenopausal women as long as they are effectively estrogenized.^[80]

 

 https://en.wikipedia.org/wiki/Testosterone

Darwin Day Questions: How does evolution explain homosexuality?