Abstract concepts such as fair and honorable can tie you up if you slavishly try always to follow them. This is a good way to get yourself into agreeing to or doing something that may be bad or even harmful to your child. Remember, I advocate trying to do what is best for your child rather than doing what your child wants you to do. Often, you will find those two things incompatible. If you fall into the manipulative game your child plays, you may just find you have agreed to something you feel very uneasy about.
Social pressure is another tool children use on their parents.
Most parents want their children to be popular and have friends. They want their children to develop peer relationships and develop social skills. They may even want their children to be able to do what everyone else is doing, and this is where children devise another game. There will probably be some things everyone else is doing that you may not feel is good for your child. It might be a good idea to realize that all the other kids may not be getting to do it and your child is just telling you this to work you into agreeing.