Speaking of gay,

Brandon tried to help his friend's Ryan Knox's "flagging" career, by fluffing him on set prior to his scenes.

But Ryan ruined this plan because he was only able to cum in Brandon's mouth.

Brandon however took his new skill set and used it to provide paid services for 20 euros in parking lots and bathrooms across the European continent, including in Barcelona.

This is what he means by "improvise, adopt, overcum".