Addicted to a particular pleasure even when you know it has its drawbacks.
Even after one has seen and understood that there's a better way, that's still not sufficient to abandon sensual pleasures. One would need to attain and experience the higher path himself. As taught in MN 14:


  Even though a disciple of the noble ones has clearly seen as it actually is with right discernment that sensuality is of much stress, much despair, &amp; greater drawbacks, still — if he has not attained a rapture &amp; pleasure apart from sensuality, apart from unskillful mental qualities, or something more peaceful than that[4] — he can be tempted by sensuality. But when he has clearly seen as it actually is with right discernment that sensuality is of much stress, much despair, &amp; greater drawbacks, and he has attained a rapture &amp; pleasure apart from sensuality, apart from unskillful mental qualities, or something more peaceful than that, he cannot be tempted by sensuality.