Wet and Dry

Sean and Paddy had been to the pub and at closing time went for a supper at Paddy,s Come time to go home Paddy opened the door and it was pouring with rain.
"Be Jasus, You cant,t go home in this you will get soaked Sean, You can stay here tonight"
"Oh! Dats very nice of you Paddy"
"I, go upstairs and get your bed ready" said Paddy.
When he got downstairs again Sean was standing there wet through.
"Sean, What the Divil have you been doing to get wet through like that?"
"I went home to get my pyjamas"