I think it's inappropriate and indecent to whip your tit out with no coverage while others are enjoying their meal. I think it is a natural act but their should be modesty because other people have to be around you. It isn't as simple as not looking. I have worked at places where people have complained about women in thongs and they are told to cover up or leave, simple as that. These people could have looked away but when you consider children and teens, not to mention yourself, looking away does not always work. It is no different IMO, because you are able to tell a woman how to use her body in one instance but not in another on the basis of decency.