People who are very expressive of the serotonin system tend to be traditional, conventional, they follow the rules, they respect authority, they tend to be religious -- religiosity is in the serotonin system -- and traditional people go for traditional people.
Människor som uttrycker serotoninsystemet tenderar att vara traditionella,  konventionella, de följer regler, de respekterar auktoriteter, de tenderar att vara religiösa, religiositet finns i serotoninsystemet... och traditionella människor  söker sig till traditionella människor.