What makes orgasms so much better when you tilt your head back? I guess it's like a submission that makes it all the more erotic. Of course orgasms are also super-relaxing and makes you want to collapse/rest.
Ha... I'm the exact opposite... when i reach climax i am tense all over .. muscles tight, stomach clenched and head stretched forward...I also hold my breath...it makes for an incredible release when i let go...some times its so good I cant help but cry...
When I'm approaching orgasm, I tend to tense up, but as it's actually happening, I usually do tilt my head back, arch my back, and/or put my arms up over my head in abandoned-like bliss. It's not something I do consciously, the orgasm just takes over and I give myself completely over to it.