I’d rather have the perfume person. As others have said, perfume will fade. B.O. will only get worse.
I’m also perfume-sensitive/allergic, so I’d rather have the B.O. person. I have experienced this in action, in a way. There was an aerobics instructor at my gym who was apparently worried that her B.O. would be offensive, so she basted herself with perfume before workouts. If she was between me and the fan, I found it almost impossible to keep working out because I’d start having trouble breathing. The smell of honest sweat would have been far, far preferable.
BO is worse. It just intensifies, while perfume will eventually dissipate.
You do that in NYC? Has anyone decked you yet, or told you, “Really? Well, that is a hideous outfit you’re wearing”?
BO is worse. Our security guard showers maybe once a week. He sits in a windowed foyer, baking. By Wednesday, he smells like a pile of hot garbage.
IMHO (hint, hint),
It’s B. O. over perfume by a nose.
But either way, I’d probably spend that entire car trip with my head sticking out the window like a dog.
I’d rather be stuck with the perfume/cologne person, as long as they didn’t continually re-apply it along the way. With B.O. not only can someone’s body keep making more and more of it, the odors can come from multiple sources. Most perfume/cologne weaers only apply it to certain areas.
The BO person would NOT be my choice.
Does the OP have to choose one or the other for some reason?
Yep. B.O. Plenty and Fritzi Ritz are standing by the side of the road waiting for a lift.
Depends on the B.O. Just underarm isn’t so bad, but other odors that appear to emanate from other cruxes, well…
Well, since BO doesn’t make my throat swell shut and certain perfumes can, I’d have to go with the BO.
Yeah, but couldn’t you use the same excuse for B.O.? 
That’s one helluva choice… B.O. or eau de toilette.
Can it be American B.O or does it have to be French?
I have a worse reaction to someone wearing too much perfume, but the big benefit of it is that its scent doesn’t linger nearly as long as B.O., and when it does start to fade, it smells rather nice. I’d rather be stuck in a car with someone wearing too much perfume.
I think I’d have to choose the perfumed person, but vile B.O. or not my poor mom would have to take them, because she’s violently allergic to a fair number of perfumes. Allergic to the point of horrible asthma attacks. It’s been a problem for her (due to jerks) at a couple of jobs. That’s a rant in itself, though.
I used to have to endure my brother’s stench before the Air Force made him start showering more than once a fortnight or so. (I love that word.) Ick.
Odors have a tendency to cling to you, both physically and psychologically. I’d rather have someone’s perfume clinging to me over nasty body funk.
Eewww. “Nasty body funk” is bad enough, but clingy too? gak Give me a perfumed body (or a plane ticket).