The headline should have been "Science Finds That Over Time Trucks Get Bigger As Penises Get Smaller"
Good news is now you have an excuse to get your big truck lifted up real high, because your penis will continue to get smaller over time
According to this article on Fatherly:
“The penis can lose about a centimeter of length from your rock solid thirties to when you’re in your about to retire sixties,” Dr. Jamin Brahmbhatt, a Florida-based urologist, told Fatherly. “The difference, honestly, is minute, and many men may not even notice the difference.”