One of two things are true. 1) there are lots of nerve endings there, or....2) I'm a puzzy....
There's more nerve endings in your index fingertip than there are in your dick. Yeah, it hurts!!
Table saws are a sonofabitch. I've seen more traumatic finger amputations due to table saws than any other 3 tools combined (radial arm saws were worse, but they're not so common any more). I got to the point where my own table saw had become a bench with my MEC shotshell reloader mounted on it.
Glad you didn't lose your fingers, Don!
P.S. Take the pain-killers.