JessM I cannot resist the opportunity your post has afforded to retell my favourite story from our early married life. DH & I were to attend my Father's works dance with my parents and had arranged to pick them up en route, but as my sister was more or less passing our door she gave them a lift to our house to save time. Meanwhile, we were getting ready to go but when I popped into the kitchen, wearing only bra, stockings and suspenders, DH leapt from the bath, dripping wet (and minus his 4 front teeth plate) and started to chase me round and round the house, with back humped, dragging a leg and emitting bloodcurling groans. I fled before him, screaming like a Saturday matinee heroine.
Meanwhile, my parents waiting patiently on the doorstep, having rung the bell (which did not work) became alarmed by the noise and tentatively opened the door to be greeted by me in my scanties, screeching across the hall pursued by an apparition bearing a slight resemblance to their new SIL. They quietly closed the door, waited 10mins and knocked again. The matter was never mentioned again, but they certainly never, ever entered our house unannounced thereafter.