Krishna addresses Arjuna directly: O Kaunteya, pleasures born from the contact of senses with their objects are in fact sources of suffering. They have a beginning and they have an end. A wise person does not get absorbed in them.
The craving for sweets is a good example. The desire comes, the sweet is eaten, the taste is enjoyed — but within minutes the pleasure fades and hunger returns. The joy was fleeting. Whoever recognizes this does not get caught in that cycle.