This is a great thread. I agree it's a joke (for me, anyway - some women have painless labors, too, but that was not me). Mine was a completely natural, supposedly non-traumatic, homebirth. I was in the worst pain of my life for about 8 hours. There was a long period (thankfully I don't know how long) where the pain didn't go away between contractions. It lessened slightly, but didn't go away. (Yes, I know lots of people have it much worse.)
I did have the high afterwards, but for the first 24 hours I was absolutely convinced I was never having another child (which made me sad). After that, I was willing to consider it as a distant possibilty.
What really got to me was when I read my MW's labor notes at 7 weeks pp. I was interested and enjoying reading them, but started to feel sick to my stomach. I blamed it on too heavy a lunch. But then every time I thought about labor or read a birth story, or even read posts about ways to deal with contractions, I would get cramps and/or feel sick. And, yes, I remembered the pain, and still do, quite clearly.
At this point (6 months later) I am finally not having a physical reaction to the thought of labor most of the time.
I think part of it for me was that I had this deep down feeling that if it hurt so much, I must not have been "handling" it well enough (or that I had painful expectations, even though I thought I didn't, that had set me up for it). So, even though I survived and had a (wonderful!) homebirth like I wanted, I didn't feel very strong. Lately, I've started thinking about it differently - remembering the pain, but also remembering that it was (slightly) easier to deal with (truly, it was) when it got so overwhelming that all I could do was just let it happen. This might make sense only to me, but it has helped me think about the pain less negatively.
I probably will have another child. At this point, the pain of labor is a minor point in that decision (it will be awful, but it will not last terribly long) - I'm a lot more concerned about parenting a toddler while pregnant and parenting a toddler AND a newborn while recovering from childbirth. The experience of the second will determine if there will be a third.

I hope you can get some help dealing with your psychological reaction to the pain memory. You don't have to forget the pain. You just have to find a way to think about it that won't make you feel horrific every time you think about it, kwim?

to you, Caitrin, and to all of you with traumatic birth memories.
ETA: I agree with pp who said you should tell your family quite clearly that talk about forgetting the pain is hurtful to you and that you do not wish to discuss the subject.