Their insults towards others are generated by their own insecurities.  Fat women know how sexually repulsive they are, so a thinner women who has a fulfilling sex life is a "whore".  Fat women have disgustingly lose vaginas which have access to them somewhat restricted by masses of subcutaneous fat stores.  Therefore, men have small dicks. See, it's their way of taking their own problems and turning them around on other people instead of accepting what they are.