How many marathons can a man weighing 70 kilos run on the energy of the semen he will produce throughout his life?

Explanation

The verb 'to ejaculate' comes from Latin and literally means 'to throw up'. Every time a man ejaculates he produces 1-2 tea spoons of semen. If he is potent for 70 years and comes twice a week, this means a total of 70 x 52 x 2 = 7,280 portion, the equivalent of around 50 litres of seamen, or a half-full bath tub. Energy-wise, it is the equivalent of 50,000 calories or 17 marathons.