After taking a bit of confidence he asks one of his patients that they did when they had the need for sex and the patient replied: That they went down to the river.
The weekend came and the doctor went to the river, and there was a huge line of men standing on the shore of the river.
Being so well-known in the village, the locals gave him their position on the line, until he reaches the top of the line.
Looking ahead the doctor realizes that there is a donkey, he thinks: Wow, have sex with an animal? Poor people. And I cannot deny me now that they have so graciously ceded their positions.
Within fifteen minutes of having sex with the donkey, while all the men in the row watched, as he kissed her and bit her ears, one of them walks up to him and secretly ask him: Doctor,
how long till you finish? We need the donkey to cross the river, there is a village with women there.