In answer to the question, “Why do you have sex?” some 77 percent named the fun factor as their main priority, women's magazine Emotion reported on Monday in Hamburg.
Meanwhile, 65 percent said they pursued sex for a sense of closeness.
Overall, 41 percent said they did it to feel desired. But when the magazine broke that question down by gender, almost half of women named that as their main goal, while just 34 percent of men said the same.
Another four percent named boredom as their motive for sex, but for those between 19 and 29 that number rose to about 10 percent.
Among divorced respondents, some 16 percent said they had sex out of fear that their partner would otherwise be unfaithful. Overall this fear spurred four percent of those questioned to hop into the sack.
But there were also major differences in sexual motivation between states. While 96 percent of respondents in the northern state of Mecklenburg-Western Pomerania said fun was their prime sexual motivator, just two-thirds said the same in Rhineland-Palatinate.
Research institute Forsa questioned 1,005 men and women between age 18 and 64 for the poll.