Because it's Friday

Swansea Zoo had acquired a female of a very rare species of Gorilla. Within a few weeks, the gorilla became very cantankerous and difficult to handle. Upon examination, the Zoo veterinarian determined the problem. The gorilla was on heat. To make matters worse, there were no male gorillas of the species available. While reflecting on their problem, the Zoo management noticed Gareth, a big Welsh lad from Llanelli, responsible for fixing the Zoo’s machinery. Gareth, like most Llanelli boys, had little sense, but seemed to be possessed with ample ability to satisfy a female of ANY species. So, the Zoo administrators thought they might have a solution. Gareth was approached with a proposition. Would he be willing to have sex with the gorilla for £500? Gareth showed some interest, but said he would have to think the matter over carefully. The following day, Gareth announced that he would accept their offer, only under three conditions:
“First,” he said, “I don’t want to have to kiss her.”
“Secondly, you must never tell anyone about this.” The Zoo administration quickly agreed to these conditions, so they asked what was his third condition.
“Well,” said Gareth, “You’ve got to give me another week to come up with the £500.”