The 'sorry' addition is what is funny about this sign. Signs are designed to state information clearly and professionally and the 'sorry' gives the sign a human element that is uncharacteristic. JOKE EXPLAINED.
The original sign creator being 'shut down' by the second sign creator in such a forceful manner is what causes this exchange to be funny. JOKE EXPLAINED.
The addition of the fine is what causes this sign to be funny. Once you are dead, charging you a fine seems unnecessary. JOKE EXPLAINED.
What is funny about this sign is that the cost of a pizza is so much less than the cost of a house, making this reward paltry in comparison to the cost of the home. JOKE EXPLAINED.
What's funny about this sign is that there is a perceived extreme threat (the shark) that is given as a reason to do something small and annoying (peeing in the pool). JOKE EXPLAINED.
‘I have all the correct chromosomes of a woman so it's not a gender or cosmetic thing because it's not what's outside that is different. I can't see inside what is wrong with me.’