Even if it doesn't turn you on, it is generally considered a sexual thing by most people unless it's a professional situation(and not one of those massage parlors where they give "happy endings"). Giving a massage is one of the most-used ways a guy will try to get close to a woman sexually, especially if he isn't sure how to initiate putting the moves on her because he's nervous. It's a trick used by guys to get a chick relaxed and to get a chance to touch her under pretenses that it could just be entirely innocent. If she seems receptive, he goes for an accidental-on-purpose grope or brushes against a breast, or suggests it will work better with her bra off. This often leads to sexual activity if the one being massaged is interested in the person giving it and lets it happen. Girls do this to guys too. I've done it to guys, and that's how my first husband got me in bed the first time. Therefore, most men would agree with your brother. I can certainly say that if my husband was getting massages from a woman I'd rip him a new one, so to speak. If he went to a spa or something, though, and received a professional therapeutic massage, I'd be mostly okay with it.