See, these are the kind of nuggets one keeps to themselves until they have a romcom to promote.
The actor, who's currently promoting his romcom That Awkward Moment (which lasts 94 minutes), was recently asked where the craziest place he's ever had sex is. He replied to E! News: "I think it was at prom with my girlfriend of three years." Before you assume it was Vanessa Hudgens, it wasn't. He left high school in 2006.
The 26-year-old star, who has admitted to being a fan of doing it on the kitchen table, also said he believes in love at first sight, but added: "It doesn't mean it's permanent love." Way to keep the options open.
Zac - who dated his High School Musical co-star Hudgens from 2007 until 2010 - also revealed he doesn't have a particular type when it comes to women and is open to dating all different types of girls: "There's no criteria. I like a lot of girls. I have an open mind. You don't know. There's one out there that you meet and you don't why but they're perfect for you." Lily Collins is feeling fierce special right about now.
Zac is now in a 'great place' after completing a stint in rehab last year for alleged cocaine and alcohol abuse and he was recently seen wearing a blue Alcoholics Anonymous chip, marking six months of sobriety. He explained: "I feel great, better than I have probably ever in my life. I'm in a great place and it's nice to be here and promoting a movie that I feel very proud of (here's hoping the trailer isn't doing it justice...). It just feels like a whole new chapter for me."