Men like to push to make kisses sloppier, while women want to keep them long, suggest a new study. Also, a kiss shared between a man and a woman seems more like a clash of spirits than a meeting of souls.
"Women tend to use kissing to create a bond with their partners, and to assess them as potential mates. Meanwhile, men use kissing as a means to an end," said Susan Hughes, a psychologist at Albright College in Pennsylvania, told Life's Little Mysteries.
And that end is sex.
"Males are kissing primarily to increase arousal for their partner," she said.
Hughes and her colleagues researchers probed the kissing preferences and opinions of more than 1,000 males and females in their sexual prime - college undergraduates - who were asked to mark their answers to a series of kissing questions on a 5-point scale.
The results showed that both men and women consider kissing an important and intimate interaction. Both sexes use kissing to gauge the relationship compatibility of themselves and their partners.
Furthermore, both may become more or less attracted to their partners based solely on their experience kissing them, a result that lends support to the theory that pheromones and other important biochemical signals get exchanged when people kiss.
But the similarities end there. While women usually consider a bad kiss to be a deal-breaker, men reported that they would more than likely still have sex with a woman even if she were a bad kisser.