<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Why are people called Irish Twins?
<|assistant|>
The term "Irish Twins" is a nickname referring to a pair of children born close together, often within the span of a single year. It may also be used to refer to two people of the same profession or who have an otherwise close friendship. The term dates back to at least the 1700s and derives from the tradition of Irish families often having large families, and having multiple births in close succession. This has resulted in a high number of "twins" within the Irish gene pool. The tradition of calling two or more close siblings or friends "Irish Twins" has since been adopted by many other cultures, as well as becoming an occasional nickname for sets of twins born into non-Irish families.