sweet spot

noun5

1. •
   Any place that is optimal for obtaining a certain desirable effect or result.
2. •
   Any of several places on a bat, racquet, etc., with which to hit a ball, resulting in the latter rebounding with some optimal desirable effect, such as minimum vibration or maximum velocity.

   • He hit the ball with the sweet spot, resulting in a gapper.
3. •
   The spot of a lens in where image clarity is perfectly clear and sharp.
4. •
   (figurative) Any set of conditions that is optimal for obtaining a certain desirable effect or result.
5. •
   (slang, euphemistic) The clitoris, prostate gland, or other internal center of sexual pleasure.