BO may be more of a man thing.

Some men are sensitive to de-odorants. I will have BO soon after dressing, after a bath or shower, if I don’t use some type of deodorant.

Since deodorant irritates my skin, and I have a history of skin cancer in my family, I do not use de-odorant on my skin. What I do now, is I use a hair drier, and dry my under-arms and crotch hairs. I then put on powder, with my under arm and crotch hairs holding the powder. I use Extra Strength Gold Bond Body Powder. I believe there is a 4-Oz and an 8 oz. size. The 4 oz size seems to be finer grain powder, and is more effective under my arms.

I always wear T-shirts, and that helps hold in the powder.

I will spray Gillette Right Guard on the inside of my outer shirt, if I feel I need extra protection.

One problem is laundry. Even if just had a bath, and I put on a T-shirt that I wore yesterday, may look Lilly white, but once the sleeves get warmed up, there will be detectable BO.

I am assuming you are speaking of under-arm BO.

When I was 20 or so, and I did not have a good laundry situation, and I did not realize how to help my situation, I was embarrassed by at work one day by a lady, who suggested the problem to me, and I just never went back to work on that job again.

One of your options is to send an E-mail back to the guy, and suggest some options for feedback, in a kindly way. It is difficult to smell your own BO, so a partner would be helpful. My wife gets on me if I take short cuts.

Oriental people have minimal BO, and oriental men do not use deodorant. Offer to go to the Laundromat with the guy, and take some drier static pads, or fabric softener in the final rinse helps clothes smell good.

$6 for powder, and $1.00 to wash a shirt does not sound like an insurmountable problem. Work together to build some habits.