Why don't they make more science fiction movies? The answer to any question starting, Why don't they- is almost always, Money.
Robert A. HeinleinSex, whatever else it is, is an athletic skill. The more you practice, the more you can, the more you want to, the more you enjoy it, the less it tires you.
Robert A. HeinleinThere is no such thing as luck; there is only adequate or inadequate preparation to cope with a statistical universe.
Robert A. Heinlein