I got round to sampling no 5 in Six Scents Series 1. Labelled 'Illicit Sex', in all honestly it doesn't remind me of sex at all, illicit or otherwise, but even so, it is one of those perfumes I would call 'odd'.
A few months ago I wrote about the first in series 1, no 1, here. It smelled like candied pineapple to me! No 5 is perhaps not quite as strange, but I also found it less interesting too. Boiling it down to basics, it is a peppery incense fragrance, but having said that, it didn't really smell that peppery or incense-like to me. It did smell quite synthetic, in a style that I could see Comme des Garcons doing. I was going to try describe what no 5 smells like, but honestly, I don't know if I really can.
When searching for reviews, I came across a particularly scathing review of this by PereDePierre, here, if you're interested in reading another take on it. For me, I thought it was different enough to write about, but am not sure if it is something I would wear regularly. I prefer the pineapple!