Salt eating dis order - eating salt by the spoonful

I don’t know how this started but basically I honestly eat mouthfuls of SALT. I have been doing this since I was around 13 or 14 and I’m now 28yrs old. I think it started when I was in care in children’s home we used to sit round the table and dare each other to eat the pepper and the salt. Let me make this a bit clearer! My habit is complicated what I do is normally pour a packet of salt in to a microwaveable container and pop in the microwave for about 60secs and then I leave it to cool for a min. Then I would break it up in to little bits ( cos it come out in a block) and I take some pleasure out of the whole ritual of breaking it up then what i do is put large chunks in my mouth and spoonfuls I’ll crunch it around for a bit and then I’d spit it out and clean my mouth out. I don’t actually digest it cos i am sure if i did i wouldn’t be here writing about it. I have had checks done on my salt levels which are normal i don’t suffer with high blood pressure and i don’t suffer with any side effects as a result of my habit. The only thing i do get is a sore mouth and if that happens I’ll try and stop for a few days and the funny thing is i can stop when i want to because my BF did live with me at one point and obviously I couldn’t do it with him around. Although one time he did catch me in the act and he screamed at me what you trying to do kill yourself but it was never mentioned again after that. I know no one else is going to have the same problem as me but it would be interesting to hear what people think of this problem. I want and need to stop but its like smoking to me it takes will power as i have been doing it for such a long time. one other thing i think it could be a form of subconscious self harm or just a plan old weird eating dis-order I know that if I am depressed i will do it and actually i do it when i am happy as well.