Your tailbone hurts because a stock motorcycle seat funnels a surprising share of your body weight onto your two sit bones and the coccyx right between them — a patch of contact smaller than your palm. Sit on that for an hour while the bike hammers vibration up through it, and the soft tissue over the tailbone simply runs out of tolerance. That's anatomy meeting a hard saddle, not a sign you've gone soft.
Two things make it worse. First, most seat foam packs down over time, so a seat that felt fine three seasons ago is now transmitting far more of every bump. Second, when you get tired you tend to roll the pelvis backward and slouch — which rotates even more weight directly onto the coccyx instead of the sit bones that are built to carry it.
Practical fixes: consciously sit on your sit bones with a neutral pelvis, shift position every 15–20 minutes, stand on the pegs briefly over rough pavement, and break up long stretches. Then deal with the contact point itself — pressure that's spread across the whole seat instead of concentrated on three bony points, plus a layer that absorbs the sharp hits, is what lets riders describe finishing a long day without wincing at the last hour.
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