Temptation and curiosity are rational until irrationally acted upon.

He was too explosive for her to touch him so intimately. It would lead to the wrong things. And places he'd banned himself from. As her protector, he had to stay away from her. That was how it worked. This, he could not stray from. Not again.
Even if it killed him.

Curiosity is the lust of the mind.

Now it is quite true to say that curiosity, exactly like its analogue, lust, never ends and is never satisfied; but man was made for something more than this. He was made to rise, above curiosity and lust, to love, and through love to the attainment of truth.

Desire to know why, and how - curiosity, which is a lust of the mind, that a perseverance of delight in the continued and indefatigable generation of knowledge - exceedeth the short vehemence of any carnal pleasure.

The sensory misers will inherit the earth, but first they will make it not worth living on. When you consider something like death, after which we may well go out like a candle flame, then it probably won’t matter if we try too hard, are awkward sometimes, care for one another too deeply, are excessively curious about nature, are too open to experience, enjoy a nonstop expense of the senses in an effort to know life intimately and lovingly.