The Lesson of Lot

In Genesis 19, when God plans to overturn and destroy the five cities of the plain, he sends angels to the city of Sodom where they meet Lot at the city gates. Lot seems greatly concerned that the angels should spend the night in his house but the angels insist they wish to spend the night in the city street. Lot puts a great deal of pressure on them and eventually convinces them. However all the people of Sodom surround Lot's house with intent to "know" (traditionally interpreted as carnal knowledge) the angels. Lot offers the men his daughters instead, whom he says are virgins, but the men were not interested.