Getting the best of both worlds.

Best Done in Mixed Company

Work Both men and women on the team mean a wider range of perspectives and a more creative approach to problem-solving.

Saturday nights out Much more fun on the dance-floor, and studies show you're safer walking home in a mixed group.

Barbecues One of the last places where everyone's happy with gender hierarchies: men grill the meat; women provide the salad. It's hunter-gatherer heaven.

Best Done Among Your Own Kind

Talking politics Women feel sidelined as men compete to see who can pontificate the loudest.

Waxing/plucking/flossing Too much knowledge of how the other half groom can really undermine the mystique of the opposite sex.

Talking about sex Watch men squirm as women blithely discuss the finer detail of their intimate relationships. It makes them feel inadequate, ladies.