Majority residents in Kiambu county are Kikuyus. When you walk around the county, you will come to a conclusion that most marriages and relationships are between people, born in Kiambu, and who are speaking a similar first language.
These are the reasons behind it:
To keep their culture
Intermarrying leads to distortion of ones' culture. This is one reason why residents in Kiambu prefer their own partners so that their cultures and beliefs are preserved and passed on to the next generation.
For easier communication in their first language
Here, residents prefer talking to each other in Kikuyu language. It helps children to learn and master their parent's language. It is extremely hard when your partner is from another tribe, making Kiswahili and English your options for communication, in the process, kids cannot know the first language
"The house's oilskin is not for outsiders"
This Kikuyu saying is a much-given consideration in Kiambu, it simply means strangers cannot enjoy precious things of the family. Strangers cannot keep secrets for long. That is why men prefer going for women within Kiambu, of Kikuyu origin.
So that they get parents' blessings
Most parents prefer to pass their beliefs to the next generation. This starts by having their children marry from within the community of similar beliefs. For this reason, guys are going for women within the county, so that they can receive blessings from the parents.
Their women never cheat
While other women from other parts of the country might cheat when her man is not performing, Kiambu women will seek help to tackle the causes that will be making her man not able to meet her rights, they can demonstrate, they can raid drinking dens to disperse their men from alcohol, if it is the cause, among others.