When conversing with Nat one always gets a nagging feeling that he's calculating complex algorithms, just to use up some of the spare brainpower. You met in the Uni library, you were rocking and crying in a corner muttering "words...all...gone...life...over!", he was trying to get to the printer. He recovered your thesis and saved your degree, and you enabled him to meet girls. Last year you asked him what he wanted, the answer involved such a complex awry of numbers and symbols that you opted out and got him socks. With all the life-saving tech advice you've had from him over the years, it's time to get creative:

Escentric Molecules Molecule 01 (100ml - £64, 30ml - £27) is a fragrance concept that will interest him as well as making him smell hot. Most fragrances are made up of hundreds, if not thousands of scent molecules, for example the smell we identify as coffee has around 200. M01 has just one, the aroma-chemical Iso E Super, which combines with one's natural scent to smell different on everyone and insanely alluring on anyone.