I am my parents only child, no siblings, either biological or adopted.
hmmmm....does that have any freaky side effects?
It relates to applied only to those individuals who have never had siblings
right, but what effect has that had on you as a person?
Well,I wish I had a Siblings play a unique role in one another's lives that simulates the companionship of parents 
uh huh. so being an only child has made you a little off, huh? haha
Some children may have half-siblings or step-siblings, either living at the same house 
well I hope you find your metaphorical brother or sister someday! everybody deserves to have a sibling!
siblings often grow up in the same household, they have a large amount of exposure to one another