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Open access, freely available online Synopses of Research Articles Why Bad Boys Always Get the Girl and Other Tales of Evolutionary Madness DOI: 10.1371/journal.pbio.0030057 Biologists studying the evolution of But when the fi tness consequences for been mounted in the fi rst round and mate choice have their work cut out for their sons and daughters are taken into remounted in the second were deemed them. Not only is there little agreement account, mate costs are balanced by, and “attractive.” Males rebuffed in the fi rst on how best to determine the interplay may even be outweighed by, the indirect round that remained unmounted longest between mate choice and fi tness, there’s benefi ts of spawning offspring with in round two were “unattractive.” Females not even consensus on how to estimate elevated fi tness. This benefi t stems in were randomly assigned to males that fi tness. (Fitness being an individual’s large part, the authors argue, from siring were either attractive or unattractive. success in passing their genes on to sexy sons. Equivalent males were swapped out future generations.) Why females fall for How does one distinguish lothario every seven days to control for any captivating males that give them nothing from loser in the cricket world? By individual quirks that might bias the but trouble is especially puzzling. Such running a cricket tournament, of course. results. males tend to contribute their genes and For crickets to mate successfully, the To estimate the total fi t