Though often regarded as instinct, fighting is actually a skill acquired in the womb, where all babies must defeat their evil selves in order to be born. Witness nature's logical conclusion with today's Groupon: for $17, you get two general-admission tickets to Thursday Night at the Fights at William A. Egan Civic and Convention Center (a $34 value). Choose between the following dates and times:

• Thursday, March 31 at 7:30 p.m.
• Thursday, April 7 at 7:30 p.m.

Revel in the power of boxers and their damage-dispensing punches dealt during Thursday Night at the Fights. Boxers hustle in the ring, where pairs of muscle-bound pugilists can settle their scores while remaining in constant flux between underdog and overdog status. With seven fights per night, onlookers can nestle into their seats and roar to a number of matchups approved by numerous world wonders and mythologies. Though not included in this Groupon, fight followers can migrate to Chilkoot Charlie's for postfight parties, including ring-girl contests, video recaps of the game, and the opportunity to toast swollen-face victors.