Two nuns went out of their convent to sell some sponge cakes. One of them was called Sister Mathematics (SM) and the other Sister Logic (SL). When they decided to return home, it was getting dark. SL: "Have you noticed that man who is following us since a while ago?" SM: "Yes, and I am sure what he is trying to do." SL: "As a matter of fact, he wants to force us, in a sexual way." SM: "My God! By keeping the actual rhythm, he will have caught us in less than fifteen minutes." SL: "The only logic thing we can do is to hurry up." SM: "I think this will not work..." SL: "Of course, this is not working. The man is doing the only logic thing he can do: he's also walking quicker." SM: "What may we do? He will be here barely in one minute..." SL: "The only logic thing we may do is to split us. You must take the left side of this crossroads and me the right. As it is logic, he can't follow both of us at the same time." Done this, the man decided going after SL. SM got the convent concerned about what could have happened to SL. Eventually, she arrived. SM: "My dear Sister! Thanks God you are here! Tell me what happened." SL: "It happened the only logic thing it could have happened. The man caught me." SM: "My God! And what did you do?" SL: "I did the only logic thing I could do: I held my habits up." SM: "Oh, my little dear Sister! And what did he?" SL: "As a matter of fact, he bring down his trousers." SM: "Oooooh, nooooo! And then what happened?" SL: "As it's logic, a nun with her habits up can run quicker than a man with his trousers down."