Cerine ji, good question! Wholesome = good, harmless, productive, positive result result giving. Wholesome is the action which is praised by wise people and followed by wise people. Any action which will yield happiness (not pleasure, I made clear distinction between happiness and pleasure) as a result is wholesome. Free expression of emotions will result unhappiness eventually, that's why they are unwholesome. Controlled use of emotions will result happiness, that's why they are wholesome.