During an appearance on The Late Show with David Letterman Wednesday, Letterman peppered the singer with questions about her relationships with Dallas Cowboys quarterback Tony Romo and singer John Mayer.
"Tony is great, still a friend of mine," said Simpson, who admitted to regularly watching Cowboys games. "I still look at his cute butt in the outfit – uniform."
She said their relationship was relaxed and mostly paparazzi-free compared to her other romances. "I actually got to live a pretty normal life when I dated Tony – other than the whole jinx situation," she said referring to Cowboys fans blaming her for some of the team's losses.
Asked by Letterman what caused them to split, she paused and said, "What went wrong? You'd have to ask him that. He broke up with me on my birthday."
But, she added, "We are still good friends."
As for her other recent high-profile romance, Letterman said of Simpson and Mayer, "You guys met and fell in love, is that safe to say?"
"Yes, absolutely," Simpson answered.
When Letterman brought up Mayer's comments to Playboy in which he compared Simpson to "sexual napalm," she rolled her eyes. "Normally you'd think someone you care about would keep those details to himself," she said. "It was definitely a compliment, in a way. I don't really want people to know that about me. I'm like the good girl, then that happened."
Letterman suggested Simpson "could be both" a good girl and a sexual woman. "I am," said Simpson laughing. "He gave away my game."
Though she hasn't spoken to Mayer recently, she admits: "I will always care about him. I think he's a great person, a great musician, but I was very disappointed by the article."