Have you ever been interrupted completely unexpectedly while having sex? Or walked-in on others in the middle of their fun, unexpectedly?
Last night, we had the house to ourselves (our youngest daughter still lives with us, but had had a night shift at work), and did NOT expect to be interrupted at all:
Our Roomba nudged-open the bedroom door last night, and came in to do our floors without so much as a knock. The nerve of some robots!