If it's in that magazine it can be safely assumed it was made up on the spot and has no basis in reality at all. That paper is pretty much what happens when the Weekly World News meets the Enquirer on vacation in the UK. A good example of it being nonsense is that viagra has no effect on the nitric oxide (in fact, their use in combination can lower your blood pressure
too much) system, but nitric oxide supplements are often used as over-the-counter substitues for ED meds and for 'penis enhancement'.
Method of action for a drug can have a huge impact on a drugs effects, so you'll rarely find a real doctor or pharmacist mention smoking your meds. Pyrolyzing (burning) a drug can ruin the actives, create unneeded or unwanted secondary and tertiary metabolites, etc. That's why you never smoke your flu medicine or your heart medication.
Also, cannabis plants don't have a PDE5 system to be inhibited. You could try nitric oxide supplements, which can be found all over the place (wherever you'd find things like ALCAR or bodybuilding supplements), but I don't believe most plants would use that the same way, either. Feel free to give it a shot, just make sure to use clones and keep everything else (lighting, nutes, environment, etc) identical to cut down on any variances, otherwise your results mean nothing. I think it's a waste of a perfectly good experiment, but I'll wish you luck regardless.
And not to put too fine a point on it, but you're
wrong about Columbus.