Once upon a time, a family of three lived in a village

Once upon a time, a family of 3 lived in a village. An old father and his two sons. They had a buffalo. Everything was going great, when suddenly one day their buffalo died. Entire family got into grief.
That night father was very sad and while crying he came near the well. To his surprise, a fairy came out from the well. She asked the old man why was he crying. The old man told her everything that had happened.
Then fairy told him that she can revive the buffalo for him but the old man must fulfil her request.
The old father asked her what her request was. She told him that he should fuck her for at least 30 minutes without stopping a single second. The old man agreed and started the activity.
One minute passed... Five minutes passed...Ten minutes passed... Tried as hell, the old man died of exhaustion.
Next day, both his sons get up and find his father dead. They get very sad. That night the older brother comes near the well. The same fairy emerges again and lays a condition this time to revive his father and their buffalo back if he fucks her straight for one hour without stopping in the middle.
The older brother agrees and starts. He too gives up after forty minutes and dies.
Next night the younger brother comes near the well grieving and meets the same fairy. She tells him that she can revive back his father, brother and their buffalo if he fucks her straight for two hours without stopping.
To which the son agrees and starts.
One hour passes...Second hour passes...Third hour passes... At the end of fifth hour, the fairy dies and as per the promise, all the three come to life.
Surprised by that, father and older brother asks the younger one how had he managed to do that !
To which he replies, "How do you think the buffalo died in the first place !"