Don’t touch the hair on your arms or hands. It’s a natural part of being a man.
Fingernails
Your fingernails do require attention. Make sure to keep them short and clean. Use nail clippers and dispose of them in the bin, not on the floor. Girls notice small things like fingernails. If you are going to touch intimate parts of their body, they want to know they are clean.
Palms
The palms of your hands should have some visible callouses on them. Achieved by manual labour such as chopping wood or lifting weights. No excuse for no callouses, wear them as a badge of honour.
Callouses from playing Xbox or wanking don’t count.
Biting your nails is a bad habit and a bad look – stop it before it becomes a lifelong habit.