Miley Cyrus in her interview with Matt Lauer:

“I heard when you turn 40 things start to go a little less sexual, so probably around 40, around that time, I heard that’s when people don’t have sex anymore.” When Lauer said that he’s 55, Cyrus replied,  “Well, then you’re really, definitely not sexual.”

Miley Cyrus to Matt Lauer: People over 40 ‘don’t have sex anymore’ – latimes.com.