Jelly Roll is crediting his weight loss for improving his sex life with wife Bunnie Xo. "My testosterone level - and I'm cool to talk about this openly - was of a preteen boy," the country singer, 41, said in his Men's Health cover story published on Friday, January 2. "When I went in there for the test, it was bad." A normal testosterone level for a man the same age as Jelly Roll (real name Jason DeFord) typically ranges from 300 to 900 ng/dL. However, for men struggling with obesity, the number can be below 300. "The world opened up when I seen it on paper.