It helps. of course. Maybe I'm just lucky to have low or normal amounts of BO, but I don't really smell of anything from my armpits when I wash them properly (which I always do if I'm going to meet other people) when I shower. And yes, I've asked people that I trust would tell me the truth if I did smell. I don't really use antipirant, and I usually skip deo/perfume if I'm not going to a party.

Then again, maybe Scandinavia's just got a good culture for personal hygiene? We were known for being the best smelling people of all of europe in the viking age, after all. Vikings washed their hands and faces like every day, and washed their entire bodies every week! That was pretty hardcore 1000 years ago.