Help Me Think of a Witty Comeback - Gender Stereotypes

I'm seeking some help from the collective mind of Ozbargain.

I'm a woman who was recently fortunate to purchase the car of my dreams. This car does not fit the gender stereotypes for a female driver and as such it sometimes attracts unwelcome attention. This is usually in the form of some variation of "is that your boyfriend's car?". Yesterday it was a truck driving leaning out of his truck to ask if it was my boyfriend's car. I answered no, and after some time he formulated the gem "is it your dad's car?".

This has happened enough times now to grate on me and being gobsmacked every time it occurs I blunder like an idiot and politely tell them no. Now I'm sure these comments are just well intended attempts at conversing with me, but I find it quite gross.

Given that I don't want to obnoxious and just tell them straight to f-off, I would love the help of this community to formulate a pithy response for these times. I know Ozbargainers tend to excel at the witty response so I hope the collective can suggest a few gems to me.