Until I starting researching my family history, I did not understand cousin relationships at all. Once I figured them out they were easy to understand. I have provided the following information to assist any 'newbies' like me in making that transition from confusion to understanding.
The following chart describes the "cousin relationships".
For two people trying to define their relationship:
1. Identify the relationship to the common ancestor for each person.
2. For the first party, look at the top row in the table and find the column heading that defines your relationship to the common ancestor. Follow that column down.
3. For the second party, look at the first column in the table and find the row title that defines your relationship to the common ancestor. Follow that row to the right.
4. Find the cell where the column and row (from #2 and #3 above) intersect. This is your relationship.