This was a movie I believe that was on HBO or possibly Cinemax. I remember there was a doctor, or some sort of scientist and he had cultivated a breed of roses that smelled like, (and I'm pretty sure I remember this quote) "..The open lips of the vagina" He was showing them to a girl (i'm pretty sure the heroine) and I believe he was the killer at the end. Possibly soft-core.
Was he using the roses to kill people with? Or was that his profiling signature? "My God, detective, did you take a whiff of that rose he left by the corpse?"
BTW there is a real rose you can buy caled "Cardinal Hume" that smells exactly like a dead fish.