The Diddy trial is putting his freak-offs on the world stage ... and a famous sex therapist says there are elements from the now-infamous sex marathons that couples can use to spice up their relationships -- and there's a legal way to make it happen too.<br /><br />Dr. Laura Berman, best known for her show on the Oprah Winfrey Network, tells TMZ ... lots of folks are struggling in their sex lives, either from a lack of sex or boring sex, and that's why the freak-off element of the case -- for all its appalling elements -- is also titillating to some.
