How is it possible that the Higgs boson interacts with itself? Now that it is almost certainly discovered, how can a particle that gives mass to other particles, give mass to itself? Does it make a 'loop' with other Higgs bosons? How can the Higgs boson interact with other particles in such a way that it does not lose its own mass? Or does it? Must a Higgs boson interact with a particle before a hypothetical graviton can? Or does a graviton acts more like a photon, like a graviton gets released whenever a particle has mass? Thanks in advance for answering my questions, if any threads have been made already about the same questions, feel free to redirect me to that part of the forum.