Here's a conversation between a couple overheard in Boots the other day:
She: [sprays a scent onto a strip] What about this one?
He: [sniffs] Umm... don't know... too sweet, maybe?
She: Yeah, you're probably right. [sprays another bottle] And this one?
He: Weeell... I don't know, I think I just want something... you know, a bit fresher.
She: Okay, what about this one?
He: Oh, I quite like that. Yeah, that's good. [sniffs deeply] Yeah, that's definitely got potential. Let's have the bottle. [sprays some more on the back of his hand]
She: And you reckon half an hour will be enough?
He: Oh, yeah, definitely, that'll be plenty. Usually, if my skin's going to react badly to something, it only takes about ten minutes, so half an hour should be more than enough.
And with that they walked away to another section of the shop, but it was all I could do to stop myself from running after them, throwing myself at their feet and pleading, "Please could you write to your MEP and tell him or her that even though you sometimes have allergic reactions to perfumes, you don't actually mind trying them on your skin for yourself and making an informed, indivudal decision about whether you're going to purchase them." I didn't do that, of course. This is England, after all.
Oh, and by the way, in case you're interested, the fragrance which grabbed the gentleman's attention was the original Hugo by Hugo Boss.