@Plankman Thank you for your question, the idea of a aeroplane seemed absurd 112years ago remember that. Anyways back to the handjobs. According ISSM Journals: The Journal of Sexual Medicine. globally an average man takes between 5-7min to ejaculate from sexual intercourse. Results from a handjob is still inconclusive but assumes double the time, so it is between 10 - 17min. The reasons is because there are too many variables in what type of handjobs men want. But let's take 17min. R100 for 17min,10 men in one day = R1000. minimum wage in South africa is
R28.79 per hour. If you work lets say 10hours a day, that is an equivalent of
R287.90. If a Sp can master a handjob, it could take her about 7min for the guy to ejaculate(my findings on this one). So a Sp is making more money with little to zero risks, it will result in toned arms though.