" Totally.” Lisha beamed at Mercy. “I heard that you were, you know, a sentinel but I never thought I’d see you in action. The boys sometimes say that, like—” “You’re probably not as tough as the men,” Jen completed. “I’m so going to make them eat their words.” Mercy laughed. “You have to excuse them—boys suffer from an incurable disability.” “What?” “Testosterone.” Both girls cracked up. "
― Nalini Singh , Branded by Fire (Psy-Changeling, #6)