Write SQL query to solve given problem: For the customer who leaves the review content of "Tastes like Australia.", when was his/her first purchase date?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.FirstPurchaseDate FROM customers AS T1 INNER JOIN rootbeerreview AS T2 ON T1.CustomerID = T2.CustomerID WHERE T2.Review = 'Tastes like Australia.'