Thinking of heading down to the Ms. Adrenaline Swimsuit Competition? Not surprising.  Sex attracts and naked bodies flaunted for all to see, attract even more. Researchers from four universities across the US and Canada prodded into our sexual habits to answer the question of what characteristics attract us to our mates. The results were published in the journal Personality And Individual Differences, with a trend line showing those with hard bodies, a curvy waist-hip ratio and strong chin lines tend to be better in bed but perhaps more apt to cheat.