I conclude, therefore, he must be right. But his remarks run counter to an orthodoxy that is as old as Marilyn Monroe in her heyday, who declared she wore a bra to bed to keep her baps at full perk.
Since the 1950s and 60s, when women needed only two or three bras that made their breasts look like missile launchers, an enormous lingerie industry has sprouted forth.
From your "trainer" bra, to the push-up bra you wear all through your 20s (until you get sick of the "chicken fillets" disappearing in the wash and the underwire digging a trench in your chest), to the maternity bra, which could double as a hammock for small household pets, to the lacy numbers you buy when you're trying to reignite your love life after multiple children, to the sports bras and beyond, all your chest needs are - literally and metaphorically - covered.
Rouillon says we could eliminate back pain and create a perkier bust by ditching bras.
We'd certainly save a lot of money. But having covered and trussed-up that area of the female form since puberty, would the average woman be comfortable going sans brassiere? And how would the average man cope with so much barely concealed bappage on offer?
We're not likely to find out, because the mere idea of freeing our breasts from their oppression would cause panic among the world's bra and knicker makers.
They've done many underhand things over the years to keep women hooked on more, and more fancy, bras. The soulless Victoria's Secret lingerie shows are one example. Another more mundane ploy is to fool the average woman into thinking she is incredibly well endowed, leading her to buy more expensive bras. I have had roughly the same breast size all my life, for example, but where I once bought a stock-standard "C", I now have to buy a size that I once thought was reserved for the likes of Samantha Fox and Katie Price. It's pretty cynical; everyday capitalism at its best, in other words.
So Rouillon can tantalise us all with his vision of boobs at liberty, but put him up against multimillion-dollar marketing campaigns featuring the world's top models and their amazing mammaries in defensive mode and I don't think he'll make much headway.
Maybe his next research project could be on the futility of Brazilian waxes.