There was an example where a monk approached Ajahn Chah and complains that as he sits and meditates thoughts of lust just take over his mind.
“I just don’t know what to do.” Said the monk.
“That’s easy,” replied Ajahn Chah, “when the next Wan Phra comes we’ll have you get up into the sermon seat, and we’ll get you to describe to all the visitors to the monastery all of your sexual fantasies from the past week.”
The monk suddenly found it a lot easier to put the thoughts aside.
– Thai Forest Tradition, Theravada.