I'm a hairy sicilian, I don't think you will notice a thing, unless maybe your 18 and all you natural body hair hasn't grown in yet, or you natural test has not been enough to stimulate your follicles. For me, I grew chest hair at sixteen, and once in my twenties I started getting back hair which progressed over the years. A few years ago I bit the bullet and had laser hair removal. Now I still have some back and chest hair, but its light and thin and easy to shave. I'm planning on doing some more this year, you have to keep it up, each time you have it you kill a growth cycle, and depending on how many growth cycles your body has can depend on your results.