Celebrity or Joe/Jo Average, MANY a person has broken up from a long-term relationship and dated a fool on the rebound. Sometimes, a man has dated a woman on the rebound, and he's gotten her pregnant, and sometimes, if she gets back together with her long-term partner afterwards, and she discovers she's pregnant, and something happens, she discovers that the rebound guy's the father. And sometimes a woman gets pregnant to a rebound guy.

At the end of the day, Taylor Swift is an entertainer. She may write music that people of all ages love (I like her song, "You Belong With Me") and perform it, but she is a human being. And no human being is infallible.