It's normal socialization into the puritanical slave cult mentality which dominates popular culture, men especially aren't allowed to be seen to care about appearance while simultaneously being heavily judged for any deviation from the accepted norms.

I think it's actually a radical act against the established patriarchy to take the time to learn to look your best in selfies and to pose for pictures. Learn your body, use beauty products, think about what outfits suit you and what they say about you.