Kevin Federline somehow had sex with Britney Spears at least twice, as evidenced by their two sons together. This is still disturbing to us when you consider that she's Britney Spears and he's Kevin Federline.
The music producer actually bragged that he did her wheelbarrow style, or tractor style.
Oops ... she did it again, sleeping with the help. After he split with K-Fed, Britney hooked up with bodyguard Daimon Shippen for a time.
Isaac Cohen was actually a fairly serious beau.
He managed to "Collide" with Britney in 2007. Amazing.
John Sundahl and Britney Spears met at Alcoholics Anonymous in 2007 and began a short but meaningful relationship. He was reported dead in early 2015, but that is not the case - he thankfully survived a helicopter crash in Afghanistan and lived to tell us about it, and the fact that he and Britney were in fact a brief item!