I completely get if you aren't sure on a property that you might want a second viewing, or if you are discussing something over the weekend and want another look. But I do hate over the years this idea that you have a second viewing as standard. I had someone see my house today, really liked it, told the estate agent on the way out they'd like to come back for a second look ... Well go and look now FFS.
If you want to see the area at a different time just do a drive by or walk around. But it's a pain in the arse to tidy, sort the baby and dog out, go out for an hour at a time that suits them because "when buying a property you have to see it twice"...no you don't. If you have another question then go and look.
If you think of something afterwards, fine. But otherwise you're just being a pain in my already sore tits.