"Two ladies" joke

Two sari-clad ladies went out to do some shopping. One of them is known as Lady Mathematical (LM) and the other one as Lady Logical (LL). It is getting dark and they are still far away from their homes.
LL: Have you noticed that a man has been following us for the past half-hour?
LM: Yes, I wonder what he wants.
LL: It's logical. He wants to rape us.
LM: Oh, no! At this rate he will reach us in 15 minutes at the most. What can we do?
LL: The only logical thing to do of course is that we have to start walking faster.
LM: It is not working.
LL: Of course it is not working. The man did the only obvious thing to do.
He started to walk faster too.
LM: So, what shall we do? At this rate he will reach us in one minute.
LL: The only logical thing we can do is split. You go that way and I'll go this way. He cannot follow both of us. So the man decided to go after lady Logical.
Lady Mathematical arrives home and is worried because Lady Logical has not yet arrived. Finally, lady Logical arrives.
LM: Lady Logical! Thank God you are here! Tell us what happened!
LL: The only logical thing to happen. When he followed me, I started to run as fast as I could.
LM: So what happened?
LL: The only logical thing to happen. The man also started to run as fast as he could.
LM: And what else?
LL: The only logical thing to happen. He reached me.
LM: Oh, no! What did you do then?
LL: The only logical thing to do. I lifted up my sari.
LM: Oh, lady. What did the man do?
LL: The only logical thing to do. He pulled down his pants.
LM: Oh, no! What happened then?
LL: Isn't it logical? A lady with her sari up can run faster than a man with his pants down.