Do sadists make good friends with narcissists, sociopaths and psychopaths?

It would depend on the sadist and the requirements that are held to obtain friendship from any of these four.

No two sadists are the same, sadism has nothing to do with personality, honesty, loyalty, trustworthiness, or anything like that. A sadist can be a sensitive snowflake or completely imperturbable. They can have a sense of humor, or be dull as bricks. And so on.

So, the answer is maybe. It just depends on whether or not the particular sadist is compatible for friendship with the particular narcissist, sociopath, or psychopath.

Why would I have a friend that intentionally hurts other people and actually likes it in my life? That would make no sense. Inflicting pain upon others for no pragmatic reasoning is unnecessary and not something I would approve of.

Just because one lacks empathy do not mean you automatically condone mindless cruelty (which sadism often boils down to - aka entertainment).

Why do women cry more easily than men? Is there a scientific explanation?

Studies have shown women cry more than men and even for longer durations(on an averagebmore than 5 minutes). What a common psychology predicts is the stereotypical behavior of women and men that prompts them to behave differently with respect to social circumstances

Why do I always feel alone?

This is a very difficult question to answer without knowing you. There might be many reasons to why you feel lonely and abandoned.You did not have the same possibilities and opportunities as those around you. When everybody else has it much easier in life than you, it makes