One of those areas where the alpha male is unnaturally bold. Perhaps a bit too much.

Kirk, our brave leader, is always at the forefront of everything. He's the first to shake hands with the leader of an alien race, swoops into the scene when an attractive green lady with revealing clothing is nearby, designates himself at the head of every landing party (usually with his entire senior staff because the skeleton crew is apparently well-trained in elite combat tactics when the Klingons arrive), and naturally he is responsible for the actions of his crew. This means he's the torture boy when the aliens get pissed.

To demonstrate that they're in agony, captains must show their extreme discomforts in proper, subtle ways as documented in Starfleet's Pain Management Protocol During Negotiations On New Worlds (PMPDNNW). No one did it better than the Tiberius. As Spock might eventually surmise, it's all in the eyes, arms, and the cramping around the stomach. Observe and learn from the master: