Sharing a Deodorant?
If your friend has forgotten her deodorant stick or spray, share it without much hesitation. However, in any urgent situations, if you need to share your husband's deodorant, it may be harsh when compares to a ladies product. Sharing it isn't much of a risk, health-wise.
But deodorant sticks should not be shared as a habit. Except for one exception where if one person has yeast infection or fungal infection in the armpits, it could be easily transmitted to the other user. Just to be on the safer side, Doctors recommend wiping off the top of the deo stick with a tissue before using it. If you are choosing to use deodorant sprays instead then there is no fear of any kind of infections being passed one. Without your notice or by mistake, if anyone happens to use it, you will be safe and so will they !