A: On their left side

Couples who snuggle in bed as they sleep are happier than couples who sleep far apart without touching, according to British researchers, who say that your sleeping position reveals wonders about the quality of your relationship. The researchers found that one of the most important indicators of happiness involves touching. 94 percent of couples who sleep touching one another are happy with their relationship, compared with 68 percent who are happy but do not touch during the night. Being close, but not touching, also counts. The further apart couples sleep, the less likely they are to be happy. While 86 percent of those who sleep less than an inch apart are happy with their relationship, the same is true for only 66 percent of those who sleep more than 30 inches apart. Here are a few facts about sleep position:

• 42 percent of couples sleep back-to-back.
• 31 percent of couples sleep facing the same direction.
• 4 percent of couples sleep facing each other.
• 12 percent of couples sleep less than an inch apart.
• 2 percent of couples sleep more than 30 inches apart.
• Extroverts are more likely to sleep close to their lover.
• Creative people are more likely to sleep on their left side.