Is it considered cheating to ask a friend or tutor to proofread your thesis before submission? Even after having proofread my thesis many times, I think asking another person to proofread it before submission is necessary.

Is it considered cheating to ask a friend or tutor to proofread your thesis before submission?
I can't imagine why it would be cheating: So long as you're producing the majority of the content, it wouldn't be cheating to have someone check for the problems that are now invisible to you!