Dating is common in many societies, while in other places arranged marriages are more typical. Some people practice abstinence, whereas others sleep around. Whether one's spouse is expected to be an emotional partner and dear friend, or simply a familial unit crucial to stability, also varies from culture to culture. Some people greet any acquaintances with kisses on the cheek, yet others consider touching or sitting next to a person of the opposite sex an egregious faux pas.