title: Check if belongsToMany relation exists - Laravel
body: <p>Two of my tables (clients and products) have a ManyToMany relation using Laravel's blongToMany and a pivot table.
  Now I want to check if a certain client has a certain product.</p>
  
  <p>I could create a model to check in the pivot table but since Laravel does not require this model for the belongsToMany method I was wondering if there is another way to check if a certain relationship exists without having a model for the pivot table.</p>