Age.
Kadang kadang, kita cari pasangan yang sama umur dengan kita. They tend to serve as our comrade, our teammate sebab kita beranggapan yang kita akan lalui the same kind of shit everyday. Susah senang pun mesti benda yang sama. Bila exam study sama-sama semua.
Then there's the case where kita cari pasangan yang lebih tua daripada kita for the sake of experience that they had. Sometimes, us girls seek older men, who can prove to be a more thrilling experience & more matured.
But then, age is just an issue of mind over matter. If you don't mind, then it doesn't matter.