We'll have to research for ourselves, but we tentatively agree … 

Thank god for the hardworking scientists over at PornHub, quietly calculating every single video when people beat their meat. 

And since you can now know everything there is to know about porn habits, we can quickly see what kind of content, uh … spends the least amount of time on your computer screen. The top categories add more time to the 9:20 average, where the bottom ones will subtract time. 

Other than the "hentai" curve ball, it makes sense. Young, beautiful college-age women biologically make the fireworks go off faster, whereas old, saggy things make other things shrivel up. And redheads are just hot. No offense, other ladies. 

But all that really matters is how to apply this to your daily life. So, for example, you need to release some tension but you don't have a lot of time on your hands (so to speak), you'd be better off finding the services of a young lady like Dani Jensen:

Or perhaps Marie McCray:

Whereas if you have an entire afternoon to kill, we'd invite you to explore the other end of the spectrum, which apparently is filled with old people. If you really want a challenge, load up some old gay amateur men going at it, and see if you can still manage to crack one off in the perfect storm of "time adding" videos. Good luck!