Saul O. answered 06/19/25
Señor O. - Spanish Tutoring
Age is seen as a possession in Spanish, like something you have, rather than something that describes a personal trait. Since you will continue to get older, age isn't a 'permanent' trait that we would apply the verb 'ser' to. Plus, age is not the only expression that uses "tener" instead of "ser". Other examples are: tener hambre/sed (to be hungry/thirsty), tener sueño (to be sleepy), tener frío/calor (to be cold/hot), tener suerte (to be lucky) among others.