There is this notion that only women should shave their armpit and that hair removal is feminine in nature
Basically shaving underarm hair is not for fashion, hygiene wise it is advisable.
Prevents stains on your clothes
Makes it easy to clean your armpit (dirt easily gets hidden within excess hair under the armpit)
If you do not shave, using a deodorant will not do much. It is advisable to shave 2 times a month depending on how fast your hair grows.
Some people believe that hair under a male armpit is sexy. What do you think?
Stay clean and attractive to your partner!