I would think that it significantly reduces bloodflow, thereby shrinking it, or at least making your EQ fall down quite a bit to the point where it does. This has been the case with myself. If I wasn't smoking then I would be dipping(snuff). Been off cigs completly for more than 2 months now, and Im on day 3 without snuff, but I'll have to give it some time to see how significant the improvment is. But I would imagine that one who doesn't use nicotine enjoys much better EQ days than one who does use nicotine on a regular basis.