Who needs to go to school when you can stay at home in your sports bra and boxers and take selifes all day, right Kylie Jenner?!

On Monday, the 17-year-old posted a sexy photo with the caption, "can I wear a sports bra & boxers all day ugh."

Umm we guess you can, Kylie -- if you want to be a useless member of society. Oh wait you already are ...

Meanwhile ... while attending the grand opening of the Sugar Factory American Brasserie in Chicago on Saturday, the too-cool-for-school told E! News that she has quite the sweet tooth. "I eat so many sweets and so much candy but it's the Bruce Jenner genes. I have to start working out very soon," said the Olympian's daughter

Uhh good genes or good doctors? How much of that is genetic and how much of that is fillers, surgery, countering and way too much makeup?

Oh and if you want to recall what Bruce used to look like -- check out this old-school workout video from her fame-obsessed 'rents. It's amazing!