Well, just so you know usually when someone brags about conquests all they are good at is typically manipulating yet when it comes to performance they are just plain miserable and sexually selfish. This can be male or female.

Making fun of disabled or weak people tends to stem from the feeling of awkwardness and not being able to feel it's fixable or useful. Again, tends to be short sighted and a feeling of discomfort and inability to see beyond these challenges and focus on the strengths in someone despite these challenges.

Bragging typically reflects how someone has to be appreciated in order to feel important.

It's often reflecting a need to feel entitled and be serviced the way that person requires of others. If one is not serviced the way they desire then the other person is deemed bad, failure, inadequate, disrespectful and things went wrong because of the other person's failure.