I have to agree. I think that it may be more of a "mode" I get into. My wife is able to quickly identify whether I have been coding because I have not entirely switched off that mode, as is evidenced by my unwillingness to let a problem go, my continued debate until all facts are accurate, etc.

Since this behavior is not conducive to maintaining a relationship, we have developed a flag system to let me know when I need to take some time out to talk normal to her.

Oops. There it goes again (flag system). At least I didn't say boolean.