Sperm Donation - Would you do it?

ive been watching a program me this afternoon about 5 men who all was asked off a chat show host if they would donate their sperm . they would get 35 dollars for their trouble ... their was a range of ages and all but one refused as he said he had had a vasectomy' so off they went in 4 rooms with a pot and a magazine ,,, the chat show host timed them n there was a range of times from 4 mins to 25 mins and the highest one was the oldest man suprisingly .... my question to u men is would u have taken part and would you allow then to save it and single women use it would u not be scared of getting a knock on the door in years to come ?