It's hard to say. There are so many variables. First, how long has it been since your last orgasm; represented by O. Are you tired; represented by E, for energy. Have you been horned up all day, H? Have you cum close, and then held off; represented by C How many times? T And the average volume of cum. tsp The way I figure it heres my ejaculation prediction equasion:

[O/E] (4HCT + 1tsp) = volume of cum/time of day.