5ml/1 teaspoon full is the pretty standard output. Lord know, that little bit gets the original job done quite well. God didn't want a large volume of semen flooding the pussy and then washing out. Just a small dollop, thick, sticky, and jelly like to coat the cervix, and deliver a huge number of tadpoles deep into the cooter to make babies. Anyway, if you artificially hold back your seed, and watch enough porn and edge long enough, yeah, you'll shoot more than a teaspoonful. It might feel like you're gushing a pint or so, but in reality, it's always gonna be well under a tablespoonful. Any sperm bank teller will confirm.