Lubricant Fallacy

Could hand cream, body lotion, Vaseline, baby oil and peanut oil replace KY?
Is excessive usage of lubricant harmful?
Is using lubricant a girl’s flaw? If I am wet (with adequate vaginal secretions), is it better to avoid the use of lubricants?
Can personal lubricants with glycerin be used for sex?
Can lubricant ease pain caused by burns and scalds?
Would injecting lubricant into vagina cause harm to human body?
If I accidently swallow some lubricant, is it harmful?