Why are some single objects plural?
Why is it that we name some single objects as if they were plural? I’m thinking of for example a pair of jeans - you can’t buy one jean can you? But a sweater, which has the same construction - one body and two extensions for limbs - is not a pair of sweaters. A pair of scissors makes a little more sense, and I believe that tailors call them ‘a scissor’ anyway. The example of bicycle forks is also interesting - in the U.S. a bicycle has a fork to hold the front wheel, whereas in the U.K. we hold on to our front wheels via ‘forks’ or a pair of forks.