Why so many female teachers get busted?

...  for having sex with younger boys..

Almost every time I open an article with a generic title along the lines of "Teacher goes to jail for sex with student", it's a female teacher with an underage boy about 80% of the time..

Like this one from Google News:

http://www.cnn.com/2010/CRIME/04/12/florida.teacher.student.sex/?hpt=Sbin

I imagine that a female teacher would be less likely to consider it as rape, justifying it with the thought that the student would want it. They're also sluts. All of them.