Is this normal?- things i do when i masturbate

Whenever I jack off, there's certain things I feel like I have to do for it to feel really good. Nothing too weird, at least I didn't think so, but maybe it is.

First, I have to be completely naked. It feels weird if I'm wearing any clothes when I jack off- even just socks. It feels better to be naked. Most guys I know just pull their pants down a little, or even just unzip and whip it out.

When I cum, I always get the urge to tilt my head back and close my eyes and moan. It doesn't feel as good if my eyes are open when I cum, or if I lean forward.

Is this normal?