Clearly no man can relax at home in the clothes he's been wearing all day, it's simply not possible. Everyone needs some house clothes, from house coats to house trousers, it's the way forward. I cannot lounge around the house if I'm wearing jeans and socks, it just won't happen.
My house ensemble:
t-shirt (sometimes long sleeve if it's a bit nippy)
flip flops (can't abide by slippers which make me feet sweaty)
Your house ensemble: