Just like sometimes we fight, friend to friend, to enjoy life, because fighting is enjoyment. To become enemy of Kṛṣṇa purposefully, and to fight with Him, that is giving pleasure to Kṛṣṇa. Kṛṣṇa is enjoying, and He also becomes so staunch enemy. So this is also transcendental pleasure. Just like Bhīṣma. He is piercing the body of Kṛṣṇa, and He is coming with cakra. That is a pleasure. Kṛṣṇa is enjoying being pierced by His devotee. And devotee is enjoying, "Now Kṛṣṇa is coming to kill me."
So any way you can deal with Kṛṣṇa and enjoy transcendental pleasure, either as enemy or as friend or as son or as lover, as master, as a servant—any way. Kṛṣṇa is prepared to deal with you any way, in twelve rasas, akhila-rasāmṛta-sindhu. Raso vai saḥ, in the Vedas, He is the reservoir of all pleasure, transcendental. Labdha-nandini. When we exchange rasa, transcendental mellow, labdha-nandini, then we get transcendental bliss. As the materialist has centered round the sex, this way, that way, similarly the transcendentalist, they are . . . their center is Kṛṣṇa. That is the difference. So if you want to enjoy life making Kṛṣṇa as the center, that is eternal happiness. And this life means it is not eternal. Now you enjoy sex as human being, next as dog, next as monkey, next as flies, next as this, next as that. The center is sex, but you have to change according to your mental condition at the time of death in different body. That is not eternal. Bhūtvā bhūtvā pralīyate (BG 8.19). You accept one type of body, enjoy sex according to that body, then you accept another body. Sex life is there. As human being, sex life; and as a dog, there is sex life; as a fly, sex life. Fly also enjoys sex life.