Is it true that men with higher testosterone levels have more sex?

No. No relationship as there's a wide range of normal for testosterone. What's important is what's normal for you. There's no reason to seek bragging rights for testosterone. However, what's low t for one person might be just fine for someone else. In that case, guy w/lower t might have less sex drive. Don't forget barry bonds - too much t can be converted into Estradiol which can shut down libido.