[q=fire_of_avalon]What would a grand slam be? And what perverse and wicked things could be attributed to different pitches? What on earth could "curve ball" mean in this context?[/q]Several bouts of sex in one night?

Fastball = quickie
Screwball = kinky sex
Eephus = really slow going
Slider = Um. . .

About the curveball, what Doc said.