No, they don't need to because they have underwear of their own. Sometimes, if the boy feels like wearing one.
They could but there is no necessity for it
10
In general, boys are no encouraged to wear bras. If he is interested in wearing a bra or if he is uncomfortable when working out because of a larger chest, then you and your son should consider it.
If you have just started wearing bras at a young age i guess it is better and is less painful.
It is logic for girls to wear cup shaped bras to cope with shape of their breasts.
yes, some girls start wearing them when they are 7
Observant Muslim women wear bras, but they do not expose their cleavage. They do this by wearing shirts with high necklines.
Because most women are not wearing their proper size. It's best to get fitted by a professional - when you are wearing the correct size, most bras are more comfortable and help clothes look better.
I would said ages 9-12 is when they should start wearing bras. It is a personal preference and what there parents think is appropriate.
Underwired bras give more support and for your size, I think you should. Age doesn't matter when it comes to bras, only size and comfort. :D
Some boys do because it makes you look like you have big boobs.