Do the bride and groom have a right to choose a child free wedding?

Personally I believe weddings are for family and friends to come together. What is the purpose about having a child-free wedding. What is it that now a days especially millenials decide to have child free wedding. What is the point of not having the guest bring their children? Why or why not would you decide to have children free wedding?

Do the bride and groom have a right to choose a child free wedding?
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