A young boy asks his father, "Dad, is it ok for us guys to notice all the
 different kinds of boobs?

 Surprised, the 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?" 

"Yeah, you see them and they make you cry...."

 Not to be outdone, his sister asks her mother, "Mom, how many kind of
penises are there?"

 The mother, delighted to have equal time, answers, "Well, daughter, a man
 goes through three phases. In a man's twenties, a man's penis 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..."