prozzys v's porn stars

Ok so this is because of Gemma my cousin. We where watching some strange show about a porn star and her life (my grandad and his gf where watching it which kindda scared us but we where up stairs watching it i would have felt mega wired if i watched it with them :P)
So anyhow we then got talking about how come its right to sell your self in porn but its deamed as hell worthy to be a prostitute.
I dont get why though i mean there the same thing really the only difference is a porn star gets paid way more and filmed.
I was having a debat in fashion today and no one would agree with me they think its different and that prozzys are wrong and that there the kind that hang about in alleys waiting for people and then give a blow job for a fag. Thats not very open minded. (says him that doesn’t like chavs but i have good reasons for that and its not everyone has meet gangs of prozzys to take view on them)
Im in no way promoting porn or prostitution in any way!
But all im saying is that why is it wrong for a women or man to be a prozzy yet its alright for a man or women to be a porn star.
If the person selling them selfs is happy doing it and not hurting anyone then i don’t mind, and its not like all prozzys are the dirty skank type some are like people cal them Escorts which is a fancy word for prozzy. There could be reason for people selling themselves and if its the only way they can get the money for the family (if one) then i dont care its not like im going to be using one or anything so it will never effect me.
Well thats my little rant over.
Remember im not saying sell your self im all for non-selling of selfs im just saying people should see porn for what it is Prostitution!