Fergie needed therapy to stop her cheating husband Josh Duhamel
The Black Eyed Peas star - who has stood by her actor spouse despite allegations he slept with a stripper, a story he has denied - openly admits to being bisexual and says she had to learn she couldn`t have extra-marital affairs with either men or women.
She said: "I`ve been very honest with him from the get-go. I think women are beautiful, I`ve had a lot of fun with women, and I`m not ashamed of it. The problem is that I also love a well-endowed man. But just because I enjoy women doesn`t mean I`m allowed to have affairs in my relationship.
"I learned through talking with my therapist that it is still cheating even if it`s with girls, so there is a rule there."
Despite her urges, Fergie has ruled out ever having a threesome.
She added to America`s Advocate magazine: "No, that`s not happening. We`re too smart for that. We`ve done some filming but with no tape in the camera."
The couple`s marriage was recently rocked by allegations the `Transformers` star had cheated on his wife with a stripper.
However, both Fergie and Josh - who married in January - have branded the claims of infidelity as "ridiculous" and have since put on a show of togetherness.