How to use uncountable nouns as countable nouns? Here pleasure is abstract noun and how to identify uncountable nouns as countable nouns according to situations?
Your question starts from a false premise. Yes, "pleasure" can be used as an abstract noun which is not countable. But "pleasure" can also be used as a concrete noun representing acts that give pleasure in the abstract sense.
Eating chocolate ice cream with a friend under a shady tree on a hot day is one of life's simple pleasures.
Come live with me and be my love,/ And we will all the pleasures prove/ That valleys, groves, hills, and fields,/ Woods and steepy mountain yields.