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.

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.

The sex doc says there are lots of ways for couples to spice up their sex life without putting their relationship at risk … like sex toys and baby oil, which Diddy allegedly stockpiled.

The author of the newly released book ‘Sex Magic’ explains what other elements of Diddy freak-offs may help couples add something kinky to their bedroom routine, or lack thereof … and tells us why consent is key here.