Several common factors are known to modulate response, and they interact rather than acting separately. Chronic psychological stress is associated with lower sexual function — in lab studies, women under high chronic stress showed lower genital arousal than average-stress peers, and daily-diary research finds that on higher-stress days, sexual activity and satisfaction drop. Acute stress is more complicated: in one experiment, an acute psychological stressor dampened arousal, while a classic lab study found that acute sympathetic activation (exercise) beforehand heightened genital response to erotic stimuli. The type of stressor seems to decide the direction — which is why 'stress kills response' is too simple. The reliable, consistent link is with chronic, ongoing stress.

Sleep is part of the same picture. In one large sample of over 3,400 women, poor sleep quality — not short duration — raised the odds of sexual dysfunction by about half, and daily-diary studies find that a longer night's sleep predicts stronger next-day desire. For men, genetic analyses point in the same direction: insomnia and short sleep are linked to higher risk of erectile difficulties.

Medication is the factor people most often overlook. SSRI antidepressants cause sexual side effects — lower desire, delayed orgasm, difficulties with arousal — in a wide share of users: pooled estimates range from roughly 26% to 80% depending on the drug and how people are asked. Untangling the cause matters, though: sexual dysfunction is also a symptom of depression itself, affecting roughly 70% of people presenting with it. The pill isn't always the culprit — but the combination deserves attention, not silence.

Hormonal shifts and health status set the baseline. Menopause is real: hormonal changes can change response, though reviews find some women report stable or even increased desire, with psychological and relationship factors part of the same picture. Alcohol deserves a line of its own — regular heavy use is associated with sexual difficulties — and relationship safety and emotional state matter too, though those belong to the Mind side of this site (see Related reading).

One more layer: how much these factors affect you is itself an individual difference. Under the same stress, one person's response barely moves while another's swings widely. Neither pattern is a defect — it's temperament, the same way some people sleep through storms and others don't.