Best Headline Ever?

Flashier Great Tits Produce Stronger Sperm, Bird Study Shows

"The findings also give some insight into why female great tits cheat, Helfenstein added. Because "females cannot always get the [colorful] males they want," he said, the females will often settle for a less flashy mate. But the females will still sneak off for a rendezvous with a better-looking male—and a dose of better sperm.
Overall, the study has begun to unravel the century-long mystery of why males often boast brazen colors, even though it makes the birds more conspicuous to predators, Helfenstein said. "It adds a bit of understanding to this puzzle.""

Indeed.