Can we choose our own answer as best?

Question

If we can, wouldn't it be cheating. Like I upvoting my own answer and question ?

Answer 1

You won't get any XP for it and your upvote too won't be counted for badges. So, there is nothing wrong in upvoting your posts or selecting your answer as best answer.

Answer 2

Can I mark this as best, Lol !!!

Answer 3

I just did, and undid.