[Solved] A radiographic examination of the lymphatic vessels after injection of contrast material is called a(n) ____________________. Initiation of Sex: Refers to the act or process of engaging in sexual activity for the first time or starting sexual activity within a particular context or relationship. Sexual Orientation: A persistent form of attraction, whether emotional, romantic, or sexual, towards men, women, or both genders. Erotic Stimuli: Refers to sexual images, sounds, or other sensory inputs that trigger sexual arousal. James-Lange Theory: A theory of emotion proposing that emotions occur as a result of physiological reactions to events.