What do steroids do to a man's muscles, organs, and penis?

Steroids are harmful: For a normal heathy young male to take steroids for body buildings is very harmful, let me count the ways: something which is not talked about openly, is the shrinking of the testicles and poor sperm quality. Often these body builders are sterile and impotent. I have some in my practice. The other serious effects are on the bones getting soft, lower general resistance to infections .