Just an observation today.
I find that with ads, we sit there and passively absorb them without noticing their innate silliness.
Anyone really pay attention to a razor blade commercial? There is always this unshaven chap who doesn't look too happy. Then whiz-bang-boom, a few razor strokes later, he's clean shaven and as happy as Michael Moore at a buffet.
And then there's always a woman (sometimes more, if the shave was really close to the skin) and she starts caressing his face.
Conclusion: If this were true, I'd shave 3 times a day.