I haven't cried in over six years. The last time I cried was when I was 13 and my grandfather died. Since then I have lost my grandmother and a couple of Uncles, along with some family pets. I'm not counting laughing so hard that my eyes tear up. SO...is it normal?
If you're having a problem with someone who has suggested that you're unemotional due to a lack of tears, I'd wonder if there was an underlying reason for asking such a question. Then deal with that rather than the less important issue of tears vs. no tears.
-dirt dobbler