I heard this one and thought it was kind of funny.
High school sweethearts get married and start out on hopefully a long union of bliss
After about a year, the wife is having morning coffee with her mother. "Mom", she says, "I think I want a divorce".
The mother replies, "All mariages have ups and downs, what's the problem"?
The daughter explains, "Every time we make love all he wants to do is have anal sex. When we first got married my asshole was like a dime, and now it's as big as a quarter".
The mother looks at her and says "You mean you're getting a divorce over 15 cents"?