You were going at it for 4 hours!! Better than me. For the "short" time doing the deed I have always removed it. I put it back on right after. The max I have had mine off is 15 minutes or so. Usually the activity is enough to keep my BS down but I may just give a slight bolus if I feel the need.
Not a delicate subject at all. It is part of life so aske away. I am not embarrased at anything anymore. I had a 55 year old divorced women ask me the same question at a meeting for diabetes. We had a real nice conversation about it and she thanked me for all the info. No need to get red faced.
