Proper Posture for Preventing Painful Posteriors on Penny-farthings?
Penny-farthings are known for their relatively harsh ride, and lack of stability. There is no option on many frames to replace the saddle, although there were some that you could. I would get a sprung Brooks saddle, or similar, which might add a bit of comfort without significantly sacrificing the vintage look.

It will add a bit of suspension effect as well.

Something like this: