About To Try Anal???????

My boyfriend, Paul, keeps on going on and on and on about trying anal. I'm a willing partner in most things but I draw the line at back door sex. For me it doesn't seem natural. Not something a nice girl would do. Not even something a nice girl should be asked to do. And from what other girls tell me it can be very painful. So, I've always given Paul a big fat, 'NO!'. Then. recently, something happened that may have changed my mind????

Paul and I still live with our parents. We're both from large families so sex in either home is impossible. So, we do it in Paul's car. If you have sex in a car often enough you quickly discover that there are a lot of things - including Paul - (sorry I couldn't resist that) that stick out. Handles, knobs, gear levers, steering wheels, etc., etc. These tend to get in all the wrong places. However, after a lot of experimentation you find your best way. This is ours.

Paul sits in the middle of the two front seats. I straddle him a knee on each seat. Luckily the car, an old clapped out BMW, has a sunroof. So I can get my head and arms out. With a bit of wiggling around Paul can get his head between my legs and do the business with his tongue. I can then lower myself down and get him inside me. This way, with a bit of luck, I get to cum twice. I'm rather selfish when it comes to sex. Then a week or so ago something happened.

As I was getting my leg over I must have knocked the gear lever. When I moved down the gear knob, guided by the valley of my buttocks, positioned itself on my bum hole. This was really annoying. But as Paul was in a right old state after licking me I had to put up with it. But then as I moved up and down, incredibly, I started to enjoy it. Don't get the wrong idea at no time was the knob inside me. It just felt kind of groovy. However, when we are doing it we really go for it. Riding him like a winner of The Grand National. Then it happened, just as I was getting there the knob went right up my bum. I cried out more in surprise than any pain. It was my best orgasm ever.

Now, here is my dilemma. I'd like to do it again. If I tell Paul he will want to do anal. And he's a lot bigger than the gear knob. I've tried intentionally knocking the gear with my foot but it never ends up in the right place. So, what do I? Any ideas?