Will weight training decrease your penis size?

- age 15, Washington

No. There are a couple of places where this myth may have come from. First, steroids – dangerous muscle-building drugs used by some bodybuilders – have been known to cause the genitals to shrink, although weightlifting by itself does not. Second, large bodybuilders may appear to have small genitals when viewed in skimpy bikini bottoms – but that may be only in proportion to the rest of their bodies.