"Perhaps you should ask you're mum if she'd feel the same if it was her teenage son's 'needs' she was considering"

Thought that was funny!
Seriously though I would get him neutered, both mine are and they are definately still manly enough without the side effects of unwanted puppies, roaming, pi**ing in friends houses etc!
If you do decide not to for some reason? , he will survive just fine without "relieving his needs".