Sometimes, what ever you do and especially if you make selfish decisions with due consideration for the person they are directed to, you can offend. If you are doing this too often then this may be a character flaw. The problem with character flaws is that they go unnoticed by the individual. Until these are pointed out, a person can carry their flaws through life.  When we say the Lord’s Prayer we are begging forgiveness for the wrongs that we might cause others that sometimes we are unaware. Forgiveness should be given when the trespasser ask your forgiveness but sometimes you may not always be in a position to ask forgiveness of the person you have wronged and sometimes it may be a flaw.