hehehehe! I don't think I've got more conkers than lots of chaps, I used to be a real shrinking violet at school, as I was bullied a lot (Mum was from Hastings, so I didn't have a midlands accent, where I grew up), as I 'talked posh', I didn't, I 'talked proper like what me Mum did'. Mum & Biological Father ended up splitting up, best thing they could have done (he was, and remains, a bully). I ended up going to a school in Leeds, in the middle of a council estate, but the teachers there actually gave a s**t and encouraged everyone to try as hard as they could. Realised I'd actually been bullied by my Dad, and that was my light bulb moment. I don't have anything to do with him now (completely blanked him at my Uncle's funeral) My stepfather I regard as my Dad, and he gave me away when I got married.
So when you've been bullied by a member of your own family, you don't think twice about getting your ranty pants on with supermarkets!!
For a joke, when I had a lady boss at the steelworks, we played a joke on the blokes in the team. I went in for my annual review, we decided we'd tell the blokes I was going on an assertiveness course. Their comments ranged from 'What, as the teacher', to 'OMG, she'll be coming to work in Combats and a Kalashnikov!'
Trick is, even if you're quaking inside, put on a confident front. Every day. One day you'll realise it's not a front any more. If I can do it, anyone can.