Always wondered if they do or don't. Anyone know?

Try this (http://everything2.com/index.pl?node_id=1354374)

ah yeah. I suppose if you describe something to someone they can still imagine something in their mind.

Interesting stuff.

of course they do, whether they contain a visual element is the question.

I work with partially and unsighted people. I wont ask them on your behalf, but ask one yourself. There are plenty walking about and I am sure they would be only to please with your company and interest.