This might sound a bit daft but does anyone else get anxiety about people viewing your house when it's raining and they don't take their shoes off!?
I have a strict no shoe policy here for the family I just can't stand the idea of the baby crawling on the floor where someone shoes have been 
I wouldn't make them take their shoes off and make them feel uncomfortable but if they asked me would I want them to I would definitely say 'yes please, why it's raining'
Is that bad? I always ask when viewing a house if they want me to take my shoes off or sometimes I just do it without asking