Most people find that after turning thirty, they gradually realize that the little entanglements between the sexes are really not that interesting. After experiencing love and seeing through people's hearts, those instinct-driven flirtations and ambiguities become so dull that they can't be bothered to deal with them. Whether it's selfish scheming behind the scenes or deliberate disguises cloaked in a glamorous exterior, plus the insignificant sense of novelty, all of it is unnecessary energy expenditure that can't spark any interest.