It's not uncommon for males of various species to physically battle it out in an effort to win over females. But plants, because they can't move or fully sense their environment, don't partake in this reproductive process. Well, at least that's what we thought.
As an indelible component of sexual selection, male vertebrates often engage in physical struggles (female-on-female competition also exists). During the rutting season, for example, male deer, elk, and moose fight with each other using their horns. Bears and tigers claw it out, while giraffes duke it out with their necks. It even happens at the microscopic scale via sperm wars.