Unless the address/postcode brings up the words sauna/massage parlour/brothel in the first page of a google search, I really can't see the problem; unless your boss knew the address for the same reason as you were visiting.... Anyway, for all they know, you simply popped round to see a friend for a chinwag - they don't know it was the sort of friend you rent by the hour, and the chinwag was her chin wagging as she wrapped her lips round your spam javelin....
However, you might like to look at clearing recent addresses from any search facility within the device, so the other half doesn't ask why you needed directions to Knockingshop Road, or wherever it was...