National Survey of Sexual Health and Behavior
Researchers at Indiana U conducted the largest nationally representative study (National Survey of Sexual Health and Behavior-NSSHB)of sexual health/behaviors...including a SEXUAL BEHAVIOR GRAPH with a DESCRIPTION OF MORE THAN 40 COMBINATIONS of SEXUAL ACTS that people perform.
C'mon you know you want to know......
Seriously though, this is the largest study since the Kinsey study more than a half century ago, and the unique part is it included adolescent men and women. Studies like this help public health professionals study trends and plan programs accordingly.
Interestingly, the study was funded by Church & Dwight Co. Inc., maker of Trojan® brand sexual health products :)