A guy is looking out in his front yard and notices two dogs having sex. He goes outside and sees his neighbor watching them also. He tells the neighbor that he wishes he could make love to his wife that way and the neighbor tells him all he has to do is give his wife a few martinis and that should do the trick.
Several weeks later the neighbor sees the man and asks him if the martinis worked their magic. The guy said they had but that he had to give her more than fifteen of them. The neighbor was very surprised and wondered why he had to give her so many to which his friend replied, "well it took almost ten of them just to drag her into the front yard."