Why Hot Ignition Key??

[ricklove]

Mine is a 48 Tudor street rod; but I identify MORE with the in-depth knowledge and responses from this group that the Hamb, etc. I've put over 17k miles it in the past three years without any major changes. I did have the a/c serviced about 2 months ago. I drive it about an hour almost every week; just because I enjoy driving it. Last drive; when I went to remove the ignition key, it was VERY warm, almost to the point of being hot. What could cause that? Thanks!!!