Jake Paul blames a wet dream he had the night before his fight against Tommy Fury for his loss to the Love Island star.
Paul lost a split decision to Fury in their grudge fight last month in Saudi Arabia, despite scoring a knockdown in the final round.
Paul revealed he struggled with illness during his training camp and was thrown off by having a wet dream the night before the fight.
The conversation about Paul's wet dream was brought up on Impaulsive, a podcast hosted by Paul's brother, Logan.
Logan admitted to having a similar experience before his fight against KSI.
Fighters often abstain from sex before a fight to build up testosterone levels, which can make them more aggressive.
A wet dream happens when the body needs to release stored-up energy and can make the legs weak due to the connection between the head and legs.
Paul admitted that the wet dream was "one of many reasons" for his loss, suggesting that it was not the sole reason for his defeat.
Paul is keen to avenge his loss to Fury before setting up a grudge fight against YouTube rival KSI, with a rematch between the rivals being targeted for July.