Either my Butt got soft, or the seat harder

On  Sunday's ride I had Jenny, and about three miles from the end of the ride my ass was killing me. I would blame the seat, it is rather stiff, but it was stiff last year also. So either my butt got used to riding Charlene with her soft, sinky, grab your ass and hold it like a glove seat, 

or it got used to the recliner.