The single life may not be as swinging as it's cracked up to be, a study by two Wright State University professors suggests. Their random sampling of 400 persons found that singles swing less -- and get drunk and depressed more -- than married people. They also -- particularly divorced men -- are more likely to become despondent and think about suicide, or to take drugs, the professors concluded. The divorced males didn't show well," said Leonard Cargan, one of the authors. "They're lonelier, they get drunk more. After all, the divorced male makes the biggest change. He leaves the home, the children, the furniture." Thirty-seven percent of those surveyed in the study were single and 63 percent married, reflecting the national breakdown. The survey was conducted in Dayton and soon is to be published in book form. Asked how many sex partners they had in their lifetimes, 55 percent of the singles answered three or fewer. Eighty percent of the singles interviewed were under 40. Married and divorced persons, asked how frequently they had sex, most commonly answered "twice a week." The figure was less for those who had never been married. But no matter what a person's marital status, the study disclosed, they thought other persons of the same status had sex more frequently. "they're saying 'I'm not getting it, but they must be,'" Cargan said. "The Playboys and Penthouses would have us believe we're all out there jumping from one bed to another. It's inaccurate to categorize all singles as being real swingers when at most less than a third are."