Would belly raspberries help with constipation?

My female housemate who I am also close friends with, is suffering with a bit of constipation due to stress. She is doing some home remedies and will go to the pharmacy if it doesn't improve.
I have a theory that gently blowing raspberries on her stomach might help to encourage some bowel movement. Like it might have a similar effect to a stomach massage and would feel like those jacuzzi jets pressed against your stomach.

Has anyone tried this and knows if this works or not? Would it be ok to suggest to her that I blow on her stomach, or just too weird?