Purport

In earlier shlokas, Bhagwan Shri Krishna described the eternal pleasure in the state of enlightenment. In this Shloka Shri Krishna explains the deficiency of sensual pleasures. The very first fact about worldly pleasure is that they are temporary in nature. Sooner or later they are going to end. The second and even bigger drawback of sensual pleasure is that they are the sources of miseries. In fact, all addictions like drug, smoking, drinking, etc and lust are due to the effect of dependency upon the sensual pleasures. This has already been told at different places in Shrimad Bhagvad Gita that lust has the nature that it is never satisfied and keeps growing like fire. Anybody who creates dependency upon sensual pleasure has the chance to develop addictions, lust and similar unwarranted behavior leading to miseries.

Therefore Bhagwan Shri Krishna warns, that a wise is one, who does fall into the sensual pleasures but aim to achieve the higher and everlasting joy of self-realization.