Above even the humor of love between Kṛṣṇa and His parents is the relationship of conjugal love. This is exhibited between the Lord and the young gopīs in different ways—glancing, moving the eyebrows, speaking very sweet words, and exchanging smiles.
There is a statement in Govinda-vilāsa to this effect: "Śrīmatī Rādhārāṇī was looking for Kṛṣṇa very anxiously and almost disappointedly." When there is such indirect expression of conjugal love, there is smiling, astonishment, enthusiasm, lamentation, anger, dread and sometimes ghastliness. These seven exchanges of conjugal love form another state of ecstatic love.
In a direct relationship of conjugal love, there is laughter, astonishment, chivalry, lamentation, anger and dread, but there is no ghastliness. These expressions are considered to be the great reservoirs of pleasure. When these seven kinds of ecstatic loving exchanges are manifested, they attain the status of steadiness by which the taste of conjugal love expands.