Do you tap your fingernails on things to tell what they are made of?

@whywiki (6070)
May 19, 2007 6:56pm CST
I noticed today that I am a tapper. When I see drinking glasses in a store I always tap them to see what they are made from, plastic or glass. Same with vases. Do you do this or is it just me?
1 response
@Destiny007 (5820)
• United States
20 May 07
Yes, I do this. You can tell pretty quick what something is made of this way.
@whywiki (6070)
• Canada
20 May 07
I find dropping it works pretty fast too!