is it normal to be nervous about sex

i think i have a unique take on this... i worked in porn for years and i was a virgin! (means i held the camera and kept my clothes on)
YES, it looks strange as hell! that looks like it hurts. OOOH! that's not right and "jesus, what are you doing to that poor woman" came to mind my first week there...
but, sadly, that is how it's meant to go.
i am most certainly not a virgin and after a few tries, sex is FANTASTIC! it feels nice, causes a massive rush of endorphines and can be excellent exersize and stress relief...
even if it does look strange...
it's ok to be scared. but it's normal and, although it may hurt a little the first time... it will feel better in time...