If there art no god, how do you explain the sheer pleasure which arises from coming inside of wenches?

Nature's way of assuring procreation.

Pure physiology. We are wired to reproduce, so sexual enjoyment is necessary toward that end. Animals enjoy sex without the spurious belief in any gods. . Of course I realize you aren't looking for real answers here.

a "wench" is what bugs bunny uses to twist a nut

If the pleasures of the flesh are so intense just think how much greater the pleasure or the sufferings of the spirit will be. And of course the sensual things are only temporal as you know but spiritual things are eternal. The poor rich man in his torments well knew this when he beheld Lazarus in Heavenly bliss. And in hell he lift up his eyes, being in torments, and seeth Abraham afar off, and Lazarus in his bosom. And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame. But Abraham said, Son, remember that thou in thy lifetime receivedst thy good things, and likewise Lazarus evil things: but now he is comforted, and thou art tormented. And beside all this, between us and you there is a great gulf fixed: so that they which would pass from hence to you cannot; neither can they pass to us, that would come from thence. Then he said, I pray thee therefore, father, that thou wouldest send him to my father's house: For I have five brethren; that he may testify unto them, lest they also come into this place of torment. Abraham saith unto him, They have Moses and the prophets; let them hear them. And he said, Nay, father Abraham: but if one went unto them from the dead, they will repent. And he said unto him, If they hear not Moses and the prophets, neither will they be persuaded, though one rose from the dead. And all this from One who did rise from the dead and therefore knows.

Civilizations = (agriculture + systems (government + religion))