You can open it if you have something. It is also possible that the man's parents bought the car for their children's marriage and kept it open after marriage. If the car is good, it is better to drive for a few more years.

Registered in the father's name, as long as there is no transfer, it is the father's car, and it has little to do with who should always drive. If you don't want him to drive, just say so. The more embarrassed you are, the better he will drive.