How does Nick Cannon and Mariah Carey keep the fire in their marriage alive? By having lots of sex. This one comes from Nick Cannon. From Us Weekly:
TMI! Nick Cannon got extra personal while sharing the secret to his successful marriage with Mariah Carey. The 33-year-old America's Got Talent host recently chatted with Us Weekly about his recent family vacation -- and how he and Carey don't let their 2-year-old twins cramp their love life! How do the spouses of five years keep the flame alive in their marriage?

"Lots of sex," Cannon candidly told Us at the Variety Breakthrough Awards in Las Vegas on Thursday, Jan. 9.
Ok, Nick. We get it. You get lots of ass. In other related news, studies do suggest that that's the way to keep the fire alive.