Long hair on dude

It's not about age, it's about how attractive you look with it. Like literally everything else in life.

If you can pull it off, you can keep it long indefinitely. Otherwise it has always looked like shit.

when your hairline starts receding, consider cutting your hair

>>18594093
This. If you can make it look good then do it, if not then don't.

Protip: Fat people don't make it look good, but nothing looks good on a fat person, so do whatever you want.

File: th[1].jpg (15KB, 228x300px) Image search: [Google]

15KB, 228x300px

>>18594083
If you keep it clean and not leave it a greasy matty knotted mess it will look fine.

Also it will help if you have other masculine features like the beard in OP pic to shift the long hair from 'girly' to 'primal' territory

tl;dr keep a rugged but not greasy overall look