Although he liked girls and was popular with them, he didn't feel driven to have sex with them. The pattern continued in adulthood. Kurt was evaluated by several doctors and therapists, none of whom could find anything wrong with him. If left to his own preferences, he would have sex with a partner once or twice a month and masturbate two or three times a month when he had trouble getting to sleep. You can get a sense of a person's natural or preferred level of sexual interest and activity by looking at his history.
People vary considerably in their answers.
Unfortunately, just as people who squeeze the toothpaste from the bottom often marry people who squeeze from the top, people who want sex once a month often marry people who want it twice a week. And that's a real problem. There may be no blocks, no barriers, nothing neurotic, and nothing weird. Just different preferences. It's important in cases like this to look at both ends, and not just focus on bringing up the desire of the one who wants less sex.