I will never ever ever use my feminine wiles when I get pulled over. I refuse to use such tactics as I feel I would insult my own personal integrity. Over the last 10 years I must have gotten pulled over either for speeding or "rolling" through suburban or rural stop signs about 12 times. Ahem, yes that is alot. (There is an ongoing joke here in MA, that Massachusetts drivers drive like Ma**holes.) I'm guilty. Only once during these years have I been issued a ticket and that is when there was an actual highway speed trap set during a morning commute and several others were caught as well. My approach to getting pulled over is to remain quiet and matter of fact, and make no excuses.
As for being pulled over; I'm not sure it's always a car thing. I have a green Subaru Outback with a roof rack. However in my cases, yes, I was speeding.
My thinking is that these guys have heard every excuse in the book and don't feel like hearing it again. When they ask "do you know why you were pulled over" I say, "I think I have a pretty good idea". I don't bat the proverbial eyelash because of the integrity thing but also that they would certainly see through it and not fall for it and/or get angry for trying to do so. As it is their job to be stern, they are pretty curt, pissy, and with attitude when they approach the car so why aggravate it. However, my result is that they give me a warning, I thank them as I take back my license and reg, and drive off.
I end up getting free stuff sometimes. It usually happens when I just create a dialog making sure I don't come off like a "know it all". I get a free stuff from my bike shop alot. I do know some things that might be considered more male. For example I got some free stuff at a flyfishing shop after I was talking fly tying with the proprietor. I get reduced prices at my local construction home supply place, and at my local car mechanic. Now I would expect that male comradery would play here more. In the above cases I believe it is more a "you are local and supporting your local farmer" comradery. In the flyfishing case I suspect it might have been because I was female.