I'm currently doing an unpaid intern in a medium sized company, to finish my studies and get my master degree in computer science. During my college years, I've developed the habit of chewing plastic sticks - the ones you use to mix up coffee and sugar (I'm talking about those things, the correct name escapes my grasp currently).
I'm a coffee person and I generally meet with my colleagues during coffee breaks. This usually happens early in the morning and after lunch. On a typical day, I drink my coffee around 9 am and I tend to keep chewing on the plastic stick while I'm working, sometimes even up until lunch.
I try to avoid doing it while I'm with other people or while other people are talking to me, but I fear this habit may look unprofessional or even unclean. I'd like your personal opinion on the matter.
To clarify, I didn't get any signals that this habit has been noticed by my colleagues/ my tutor, nor it seems frowned upon. It's just me wondering.