Kinda hard to create The Stain®'s semen out of thin air and then apply to to Monica's dress.
Clemens, on the other had, says that McNamee injected him with things other than HGH and roids.
How big a problem would it have been for the upstanding Mr. McNamee to add traces of HGH or roids to the gauze and needles after Clemen's DNA was already on them?
So Roger never took HGH but his wife did?
However, you got to love that point in the hearing when Roger ratted out his wife to Congress on national TV.