Whilst rubbing one out...

while laying down in my bed and watching 1 of my many dvd's i noticed that as i orgasmed, my junk (i.e. cock -- LOLz) got quite hard and got VERY sensitive as i ejaculated.

comparing that while say i am sitting on the floor and watching another dvd, my cock doesn;t get as rigid/hard.

anyone here care to share or give insight why this is so?

other than being a messy cleanup, the orgasm i had whilst on my bed was quite good and fulfilling.

tia!

in bed you are more relaxed and more comfortable
the floor is not as comfortable

Well it doesn't sound like you were more aroused than normal, so it was probably gravity's way of helping you with your blood flow. I actually tend to be harder when sitting up or standing, as my dick is kinda heavy and doesn't really reach an angle past 10 degrees (going by a completely horizontal position). Were you jacking with your dick pointing up or toward your stomach?

id say while on the bed, it's pointing up

while sitting on the floor, i'd say the hardware is parallel to the floor. LOL. did that make sence?