I suggest trying Full Spectrum Foreplay which involves making love all day long. I say making because it is something that requires conscious mental effort. It requires will power. I say love and not sex because there is a definite difference. Making love all day enhances the likelihood for the night ending in sexual ecstasy for both partners. It creates connection and friendship. Even if the night does not end in orgasm, at least, and this is no small win, both partners will feel rejuvenated.