“Extra’s” resident bad boy Steve Santagati chatted with actress Reese Witherspoon about her new romantic comedy “How Do You Know,” and got Reese to open up about some of her worst dating experiences.

Reese co-stars in the film with Owen Wilson, and said that she dated a guy similar to Wilson’s character — the type of player who has a bathroom drawer full of toothbrushes.

“I have seen the toothbrush drawer,” Witherspoon told Steve about spending the night at an unnamed ex’s home. “I woke up with the toothbrushes and it was horrifying.”

That’s not the worst of the actress’ dating nightmares. Reese said she once “had an experience where I opened up the closet looking for a washing machine or something, and it was like a line of bikinis… different sizes of bikinis with the tags on them. I was like ‘Oh God’.”

Witherspoon has dated her share of A-list men, including “Love & Other Drugs” star Jake Gyllenhaal, but the 34-year-old star has moved on — and into the arms of Hollywood agent Jim Toth.

When asked if she would recommend other stars to avoid dating a fellow thespian, Reese replied, “I have a whole list of things I’d recommend. I could give a seminar.”

Catch Reese in “How Do You Know,” and we know it opens December 17.