What are the two forms of psychological egoism?

Related questions

1. What is condescending behavior?
2. Are obnoxious and annoying the same thing?
3. What is moral altruism?
4. What's a big word for nasty?
5. What do you call someone who uses big words?
6. What does effective altruism mean?
7. How do you get rid of someone?
8. Is sickeningly a word?
9. What is the most disgusting word in the English language?
10. What are the types of altruism?

Tags

1. #rational
2. #ultimate
3. #related
4. #voluntary
5. #pleasure
6. #human
7. #desire
8. #avoid
9. #egoism
10. #specific
11. #action
12. #motive
13. #several
14. #forms
15. #however
16. #psychological
17. #other
18. #ethical
19. #experience
20. #normative
21. #hedonism