My hypothesis is that, when the body is in a survival or self-repair mode, libido is placed on the backburner because it's just not that important to individual

My hypothesis is that, when the body is in a survival or self-repair mode, libido is placed on the backburner because it's just not that important to individual survival. If the body isn't seeking food, reproduction takes a higher priority. Someone else here was talking about how it might be related to a low body fat percentage, which would play into this hypothesis, and I am a fairly skinny guy(not scrawny or lanky, though).