Taint is one of the Core Stats Steele and other creatures have. It represents the genetic corruption of the character. Determines minimum Libido.

From Trials in Tainted Space Wiki. Wash away the paint from the Painted status effect and imbibe alcohol by 10%. Imbibe alcohol by 80% regardless of tolerance.

Alcoholism can affect the brain and behavior in a variety of ways, and multiple factors can influence these effects. A person’s susceptibility to alcoholism–related brain damage may be associated with his or her age, gender, drinking history, and nutrition, as well as with the vulnerability of specific brain regions.
Table 1 provides a guide to the relative alcohol doses administered in the various studies, as well as an estimate of the resulting blood alcohol concentration, for a 70 kg individual. It should be noted that individual differences in alcohol tolerance and clearance can cause extreme variation in these estimated values.

Increasing
Item/Event/Perk	Requirement	increase
Amazona/Futazona Overdose	Taint increases by 1
BionaHole Mitzi	Taint increases by 1
ClearYu	(on use)	Taint increases by 2
Container labeled 'ReductPro'	Anus or Vagina variant	Taint increases by 2
Container labeled 'ReductPro'	Vagina variant with Pumped or Slightly Pumped Flags	Taint increases by 2
Doctor Badger	Be Hero	Taint increases by 10
Doctor Badger	Cunt Snake Removal	Taint increases by 10
Dong Designer	(after use)	Taint increases by 2 Dick splitting increases taint by an additional 4
Dose of Soak	End of SoakStatus Effects	Increase taint by 1 to 3 + (2 * Times Overdosed)
Dumbfuck Pill	1st sneeze	Increase taint by 1.5 if taint is 50 or less 1.25 if taint is 70 or less, but greater than 50 1 if taint is 85 or less, but greater than 70 0.75 if taint is 95 or less, but greater than 85 0.5 if taint is greater than 95
	2-3rd sneeze	Increase taint by 3 if taint is 50 or less 2.5 if taint is 70 or less, but greater than 50 2 if taint is 85 or less, but greater than 70 1.5 if taint is 95 or less, but greater than 85 1 if taint is greater than 95
	4-6th sneeze	Increase taint by 6 if taint is 50 or less 5 if taint is 70 or less, but greater than 50 4 if taint is 85 or less, but greater than 70 3 if taint is 95 or less, but greater than 85 2 if taint is greater than 95
	7th sneeze and beyond	Increase taint by 9 if taint is 50 or less 7.5 if taint is 70 or less, but greater than 50 6 if taint is 85 or less, but greater than 70 4.5 if taint is 95 or less, but greater than 85 3 if taint is greater than 95
Goblinola Snack Bar	Minor transformations triggerd	Taint increases by 1
Goblinola Snack Bar	Major transformations triggerd	Taint increases by 1
Gray Microbots	(on self use)	Taint increases by 1
Gush Spraypen	(on use)	Taint increases by 5
Holiday	Any Costume other than Mask	Taint increases by 10
Holiday	Mask 'Costume'	Taint increases by 5
Horse-Cock	(on use)	Taint increases by 5
Illegal stimulant medipen	(on use)	Taint increases by 4
Kerokoras Venom	Taint increases by 3
Korgonne Snacks	(on use)	Taint increases by 3
Mindwash Visor	At the end of any Non-CoC or Jezebel Mindwash variant	Taint increases by 1
Mindwash Visor	Jezebel Mindwash or CoC Scenes	Taint increases by 2
Mindwash Visor Halloween	First time only	Taint increases by 5
Mitzi	Pitch Anal	Taint increases by 1
Mitzi	Cuntnosis: First Time, Lesbo Cunt or Breeder Cunt	Taint increases by 2
Motherhusk	Has Vagina	Taint increases by 5
Naleen Nip	(on use)	Taint increases by 1
Nyrean Rock Candy	(on use)	Taint increases by 3
Post Libido gains Libido greater than Taint doubled	Taint increases by 0.5
Post Libido gains Libido smaller or equal to taint doubled 25% chance	Taint increases by 0.5
Red Rocket	(on use)	Taint increases by 1
Rubber-Made	Taint increases by 2
Ruskvel	Taint increases by 3
Sky Sap	Taint increases by 1
Slutshroom	Taint increases by 5
Spunkshroom	Taint increases by 5
Thicc&Shake	Overdose	Taint increases by 10
Throbb	Libido equal to 25 or less	Taint increases by 5 <

Trials In Tainted Space Alcohol Tolerance