EXCLUSIVE"50 Shades of Grey" author E.L. James is a hack with no REAL sex experience ... at least according to porn legend Sasha Grey, who tells TMZ, she's way more qualified to write erotic fiction than some horny middle-aged woman.
In case you didn't know, 25-year-old Grey -- who starred in 271 adult films before officially retiring at age 23 -- just released her own erotic novel called The Juliette Society.
We asked Grey if she thinks she's more qualified to write erotica than 50-year-old former "Twilight" fanfic writer E.L. James ... and her response, "HELL YES."
She also tossed in a subtle insult, calling "50 Shades" a "romance" novel ... not real erotica.
But does she think she'll earn $95 million this year like James did? Watch the video. Sasha's hot.