the deodorants come in aluminium cans, and spraying directly under-arms is known to be an agent thats been found to be one of the culprits for breast cancer. so ladies watch it. dont overdo anything. you can remain clean without using too much of deos, heavily perfumed soaps, and too much body care agents. you never know the consequences of all that chemicals on you. frequent bath, cleanliness and talcum powder moderate usage of deos might help. but dont go gung ho over beauticians and groomers whose job it to push for more customers, and laugh at people who are anything below their metrics.