Would you rather stay inside the house on a warm summer day, or would you rather go outside and do something?

I'm one of those people who usually stays inside to read a book, but that's only because I really have nothing to do outside. But, I don't know, I don't have any girlfriends right now so...I don't know. If I were to go outside though, I'd probably want to go to a field or something, kick a soccerball around or toss a football around with my brother.