Some people just think they don't stink. I avoid those people. However, I did learn a little trick in Paris a few years ago. I went in early summer and - I'll put this nicely - deodorant is not a priority in Paris. So I was talking to another American and I was telling her that I was going to pass out from the B.O. and she pulled out this little bottle of perfume and she said " I never go anywhere without this. Just put some drops right under your nose."
It worked!!!