Would you rather…
de-evolve into a lizard and have lizard babies or bang the ghost that you know was boning your grandmother?
And speaking of ghosts, I can’t help but imagine that Gene L. Coon who wrote Spock’s Brain (under the pen name of Lee Cronin) is very thankful that Brannon Braga came along and made that episode seem much better in comparison. I also imagine that production companies point to Threshold and Sub Rosa as good examples of why 20+ episode seasons needed to end.