To produce the required thrust, Walky must therefore ejaculate 667 N / 19 m/s = 35 kg/s of jism. Semen is almost exactly as dense as water (1 g/mL) https://onlinelibrary.wiley.com/doi/full/10.2164/jandrol.106.001297, so that's 35 L/s (7.7 gallons/s if you're American).
This is at a single point in time; as he emits semen, Walky's total mass will decrease and he will accelerate upwards until his balls are empty.
The amount of spooge on the floor looks to be at most a few litres, suggesting he has been ejaculating for less than half a second.
He masses 150 lbs = 68kg https://walkypedia.fandom.com/wiki/David_Walkerton, so he must produce 667 N or more of thrust (heh) to counter Earth gravity.
Semen, being mostly water, is nearly incompressible: all the thrust comes from the reaction mass, with no contribution from the nozzle.
Rockets are highly sensitive to exhaust velocity. The (somewhat dubious) record for ejaculation speed is 69 km/h (nice) = 19 m/s https://luvkis.com/blogs/health/the-world-s-weirdest-and-funniest-sex-records; let's assume Walky is matching the record.
To produce the required thrust, Walky must therefore ejaculate 667 N / 19 m/s = 35 kg/s of jism. Semen is almost exactly as dense as water (1 g/mL) https://onlinelibrary.wiley.com/doi/full/10.2164/jandrol.106.001297, so that's 35 L/s (7.7 gallons/s if you're American).
This is at a single point in time; as he emits semen, Walky's total mass will decrease and he will accelerate upwards until his balls are empty.
The amount of spooge on the floor looks to be at most a few litres, suggesting he has been ejaculating for less than half a second.