It doesn't need to be that intrusive. Just mildly uncomfortable .. for a period of time longer than one would be willing to tolerate. Something like being at

It doesn't need to be that intrusive. Just mildly uncomfortable .. for a period of time longer than one would be willing to tolerate. Something like being at the dentist when you have many cavities in your teeth. You can tolerate one or two sessions. But the idea of doing it every day for two weeks straight is unbearable enough that you decide on the third day to report feeling well.