So I wasn't the only one. And it is crucial enough to have someone design a keychian for such...What's next? Soda can?
What is essentially a major concern however, is my habit to bite nails. It is so swift...so easy...I need not put my finger in my mouth for a long time, it is not a fetish, just some quick and convenient way of dealing with growing nails. Works 99% of the time (that 1%: unless I over bite it...which is a minor pain).
The main problem is there was no chance my habit allows the nail the grow, it is so automatic. I must control to allow some nail to grow. I had not remember a time I see my nails collecting dark dirt for a long long long time...since I have no overgrown nails.