Final answer:
Ivan is likely experiencing Hypoactive Sexual Desire Disorder (HSDD), a condition characterized by a lack of sexual desire and distress about it, which is distinct from erectile dysfunction (ED).
Step-by-step explanation:
Ivan is very healthy, but he is distressed by his lack of interest in sexual activity and lack of sexual experiences over the past several years. He most likely is experiencing Hypoactive Sexual Desire Disorder (HSDD). HSDD is characterized by a deficiency or absence of sexual fantasies and desire for sexual activity, causing marked distress or interpersonal difficulty. This condition is different from erectile dysfunction (ED), which is the inability to obtain or maintain an erection. While ED is associated with factors such as diabetes, vascular disease, certain medications, and more, HSDD is focused on the lack of sexual desire, without necessarily including problems with arousal or the physiological response related to erections.