http://sgforums.com/?action=thread_display&thread_id=214369&page=0
first puzzle solved by xuexue, congratulation to him!
Part 2:
We still have
Man A, Woman B, Man C, Woman D
After Man A and Woman B had sex,
Man A made one comment (1 sentence)
................
Woman B then replied with one comment (1 sentence)
................
From the conversation we can immediately deduce that Man A, Woman
B, Man C, Woman D all had sex with each other before (I mean
between opposite sex, no gay, lesbianism allowed)
that is the 2 sentences are able to prove, A farked B, D and C also
farked B, D before.
Guess what the conversation between A and B is.