I'm not even talking about old wrinkled bodies here. I'm talking about young people in their 20s, 30s and 40s.

If you're on the online dating game, you probably have already received nudes from someone, in which they only show their body and cut their face out. How come we can still guess that person's age just by looking at their body without face?

I can tell if someone is in their 20s, 30s or 40s just by looking at their nudes, even though I haven't seen anything of their face.

How is that possible? What are the subtle differences in our bodies that let us know someone is already over 30 or over 40? The fat distribution? The shape?

But even when they are fit, athletic, you can still know that body doesn't belong to a 20 something, for example.

In the end, no matter how much we care about our facial skincare, our bodies can still give away how old we are.