A young boy asks his father, "Dad, is it OK for us guys to notice all the different kind of boobs?"
Surprised, his father answers, "Well, sure son, we wouldn't be normal if we didn't .... there are all kinds of breasts...depending on a woman's age -- In her twenties, a woman's breasts are like melons, round and firm. In her thirties to forties, they are like pears, still nice but hanging a bit. After fifty, they are like onions."
"Onions, Dad?" asked his son.
"Yeah, you see them and they make you cry...."
The boy's sister over-heard this, and not to be outdone, she asks her mother, "Mom, how many kind of pricks are there?"
The mother, delighted to have equal time, answers, "Well, daughter, a man goes through three phases. In a man's twenties, his prick is like an oak, mighty and hard. In his thirties and forties, it is like a birch, flexible but reliable. After his fifties, it is like a Christmas tree."
"A Christmas tree?"
"Yep, dried up and the balls are only there for decoration..."