Thanks muscadet
I know it sounds really, really weird but I never really considered it to be a problem. It doesn't affect my marriage or my relationships with others, as they don't see it. My husband has only seen it happen once and his reaction was 'oh grow up! What the f* was that for ?'. Admittedly not helpful, but he doesn't know it is an ongoing thing for me with a long history.
I wish I could 'come out' with this, as I've been very open and honest about everything on MN (messed up childhood etc), but this seems to be my last taboo. Something I just can't talk about, partly because I feel that
a) it is a private matter which has no impact on anyone but me,
b) It's not really that serious (for me, once/twice a month or something),
c) I will just be told to pull myself together and stop being so childish. I'm acutely aware that it is a very toddler-like thing to do when you are frustrated is to bang your head or whatever, which makes me feel more embarrassed by my behaviour and in turn more angry with myself. Vicious circle.
I can't even pin-point a reason for my behaviour, yes I had a messed up childhood (alcoholic father who physically abused my mother in front of me and sexually abused me from a young age), but it doesn't explain why I do it. I know that the way I grew up isn't my fault and I have no conscious feelings of guilt or the need to punish myself either, I just don't know why I do it. I'm a rational, mature adult who refuses to live in the shadow of an iffy past, so why do I have this urge ?
I'm sorry I've rambled on a bit, I'm seen as a bit of a 'coper' in RL and I know that my coping mechanisms aren't great and that I'd be seen as weak and a fake if people knew the truth. This post is all a bit of a jumble and I don't really know what I'm trying to say, but thanks for reading.