Well, yes of course it makes sense to do shorter rides and gradually build up from there...which was my intent. But...my cycling buddy was a bit more "antsy" to go further today, and so I guess I just went along with the idea thinking it wouldn't be that bad. Looking back on the day, I really didn't feel all that terrible...just some minor butt soreness from not being in the saddle for that length of time. It'll pass the more I ride and eventually my butt will toughen up again.