In male body builders who are injecting supplemental anabolic steroids, the term "all show and no go" would mean:
a. spermatogenesis is accelerated and sperm are not fully developed before ejaculation
b. spermatogenesis is reduced due to low testicular androgen levels
c. positive feedback increases testosterone secretion by the testes and therefore increases spermatogenesis
d. sex drive is significantly decreased due to high circulating androgens
e. body builder has no time for sex

b. spermatogenesis is reduced due to low testicular androgen levels  

Explanation:

Anabolic steroids are the synthetic hormones which are used to treat the hormonal problems in males, development of the muscle mass, and to solve the problem of delayed puberty. Body builders and athletes use anabolic steroids to increase the muscle mass and improve athletic activity.

The overuse of these steroids can disrupt the production of hormones in the body. The overuse may lead to decrease in sperm production, decrease in function of the testes because of the low testosterone levels which is type of androgen hormone.

the ileocecal valve (also called bauhin valve), which limits the rate of food passage into the cecum and may prevent material from returning to the small intestine.