Welcome to the board, Shck.
On the whole, the intensity of sensation that we feel with any kind of sexual touch -- whether we're talking about on or with our genitals or about other body parts -- is as much about, and sometimes more about, how we feel in our heads then it is about the body parts we're touching or how we're touching them.
If we're not very sexually excited, then even touching parts of our bodies with the highest concentration of nerve endings (like our mouths, genitals, toes) can feel pretty meh. So, the first thing I'd want to check in with you about is about what's going on in your head before and during masturbation.
Are you feeling intellectually and emotionally turned on and sexually excited? Are you in an environment where you feel safe and free to kind of get lost in those feelings and your own masturbation? Are you taking time to get yourself more excited -- something you can do just with your own imagination -- before you start masturbating? Is there anything that feels like a buzzkill to sexual thoughts or feelings at these times?
Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it is the only thing that ever has. - Margaret Mead