Because he was under cover.
or
A sponge!
or
The ceremony was rubbish - but the reception was brilliant.
or
Because he wanted sweet dreams.
or
You go on ahead. I'll hang around for a while.
or
Use a sea saw.
or
he got a little behind in his work.
or
Only one, but she/he'll have to go out and buy the light bulb adaptor card first, which is extra.
or
Two babies screaming!
or