Who can tell me the funniest joke?

The family sat at the dining table and ate. The son suddenly asked his father, "Dad, how many kinds of breasts do women have?" The father was surprised and replied, "Well, son, women have three different breasts. At the age of twenty, their breasts are like watermelons, round and hard; When I was in my thirties and forties, my breasts felt like pears, but they were a little droopy. After fifty, it's like an onion. " "Onions?" The son asked incredulously. "Yes, you will cry when you look at them."