I'm wondering if there is much rehearsal that goes on before a porn scene is shot and if so is it very detailed? Does the director go through all the different positions that will be involved and the order they'll be done in and if there will be cum swallowing etc beforehand? This way girls could say "No I don't want to do that - leave that bit out".
Does the girl have much say in what the final movie looks like? For example if she is not happy with a particular scene can she have that bit left out of the final movie?