Rationalist materialism tries in vain to ignore this powerful aspect of sexuality: sexual instinct cannot be regulated; according to Freud, it might even possess an inherent denial of its own satisfaction; what is certain is that it cannot be integrated into the social sphere, because there is in eroticism a revolt of the instant against time, of the individual against the universal: to try to channel and exploit it risks killing it, because live spontaneity cannot be disposed of like inert matter; nor can it be compelled in the way a freedom can be.