Another way to think about this, if this were true it would mean that no elite athletes would ever be allowed to have sex. With all the money in pro sports, you can be sure that if there were any truth at all to this that coaches across the country would demand total abstinence from all their team members. The grain of truth that probably got these myths started comes from the fact that typically after release, the person is very relaxed/tired. I have also heard people say that various other trace elements, like zinc for example, are expelled from the body during release which just does not make sense. Why would evolution favor a someone who routinely got rid of essential trace elements and make himself weak doing it? High testosterone levels correspond with high fertility and increased sexual activity, it makes no evolutionary sense whatsoever that this sexual activity would weaken the body because the evolutionary goal is to produce as many strong offspring as possible.
Steroids can make pimples pop up and hair fall out. They can make guys grow breasts and girls grow beards. Steroids can cause livers to grow tumors and hearts to clog up. They can even send users on violent, angry rampages. In other words, steroids throw a body way out of whack. Steroids do make users bulk up, but the health risks are high. It's true, on steroids biceps bulge; abs ripple; and quads balloon. But that's just on the outside. Steroid users may be very pleased when they flex in the mirror, but they may create problems on the inside. These problems may hurt them the rest of their lives. As a matter of fact steroid use can shorten their lives.