That's why I'm suspicious of stats I see.
I don't know what study you are talking about but it certainly sounds awful. Here's an article about a far better study:
Thomas looks at a study of 1882 college students who were asked four questions to determine if they had ever raped (or attempted to rape) anyone:
1) Have you ever attempted unsuccessfully to have intercourse with an adult by force or threat of force?
2) Have you ever had sexual intercourse with someone who did not want you to because they were too intoxicated to resist?
3) Have you ever had intercourse with someone by force or threat of force?
4) Have you ever had oral intercourse with someone by force or threat of force?