Почему ?

почему когда болеешь возникают сексуальные мысли? Значит ли это что кайф и боль это одно? Почему мы когда болеем хотим быть наедине с болью, как с любовником? Почему? В единении с нею она уже не воспринимается как боль и исчезает?

... the uninstructed run-of-the-mill person ...
"As he is touched by that painful feeling, he is resistant. Any resistance-obsession with regard to that painful feeling obsesses him. Touched by that painful feeling, he delights in sensual pleasure. Why is that? Because the uninstructed run-of-the-mill person does not discern any escape from painful feeling aside from sensual pleasure. As he is delighting in sensual pleasure, any passion-obsession with regard to that feeling of pleasure obsesses him. He does not discern, as it actually is present, the origination, passing away, allure, drawback, or escape from that feeling. As he does not discern the origination, passing away, allure, drawback, or escape from that feeling, then any ignorance-obsession with regard to that feeling of neither-pleasure-nor-pain obsesses him.

... the well-instructed disciple of the noble ones ...
"As he is touched by that painful feeling, he is not resistant. No resistance-obsession with regard to that painful feeling obsesses him. Touched by that painful feeling, he does not delight in sensual pleasure.

-- http://www.accesstoinsight.org/tipitaka/sn/sn36/sn36.006.than.html

Секс - источник наслаждения. Болезнь - источник страдания. Обычный человек, когда страдает стремится к удовольствию, это естественная сансарическая привычка, так как обычный человек не знает другого выхода.

8БП.