I know exactly what holding a girl in your arm feels like. I'll try to describe it.
Well, physically, it's like hugging a rolled up blanket, except it's warm, it's soft yet solid (the tighter you sqeeze, the harder it pushes back).
However the best thing about holding a girl in your arms isn't really the physical feeling. It's the emotional fulfillment you get.
The feeling of being close to another human being.
The feeling that you're loved, accepted.
It makes you feel warm.
It makes you feel at peace and you forget all the trouble in the world.
It makes you feel simply happy and content.
Unfortunately, I've only experienced it once (which is probably still better than a lot of you), and it was the BEST DREAM EVER! So ronery ;_;