When first formulated the twin paradox was contrary to experience that many cited it as proof that relativity must be wrong. Nothing in everyday life leads us to believe that time is relative. A pair of twins are the same age from cradle to grave. The paradox lies in our own mistaken assumptions about the way the world works. Rather than the logic of the situation.
Common sense is wrong.
Even a reflection is relative. Alice does well to wonder whether 'looking glass milk' is good to drink. Another deviance from human symmetry, even with something we have two of, is hand orientation. Chinese is written vertically starting at the top. In Japan, one simply learns to write with the right hand even if one is left-handed, and that ends the matter.