The next day, the man comes back to the store, purchases another condom, and once again he leaves the store laughing wildly. This piques the interest of the pharmacist. What's so funny about buying a condom, anyway? So he tells his clerk "If this guy ever comes back, I want you to follow him to see where he goes.
Sure enough, the next day the laugher is back. He buys the condom, starts cracking up, then leaves. The pharmacist tells his clerk to go follow the guy.
About an hour later, the clerk comes back to the store. "Did you follow him? asked the pharmacist. "Yes I did!" answered the clerk. Where did he go?" asked the pharmacist. The clerk replied "Your house."