Thanks for your input , Kath!
And I have started to loosen up a bit about lying on the couch when the guests either enter or exit the house. But I do speak to them about their plans for the day, or ask if they need anything, etc.
One terribly EMBARASSING event backfired , though!
Two college guys staying here told me that they were headed to Garden of the Gods for the day ... a 90 minute drive. Well, I was home cleaning, and by 11 am, it was already 95 degrees outside. I had my A/C on, and a fan, but I was still sweating! I rested on the couch in front of the fan, and took my CLOTHES off.
In they walked!
They instantly said, "Sorry!", and shut the door quickly. I threw my clothes on, saying I was hot!, and it wasn't mentioned again.