Lasers have been around for over five decades and, originally considered "a solution in search for a problem", have become ubiquitous in everyday's life and technology. A mathematical description has been elaborated over the years and has lead to very well-established models whose predictive power has been proven time and again. A little-known shortcoming of most models, however, is that they are in open conflict with Quantum Mechanics and Nonlinear Physics. The paradoxes will be discussed and an explanation will be offered for the reasons why such non-trifling inconsistencies are largely ignored, usually without trouble.