Flynn is very forceful when he's drunk, but Yuri can't say he minds.
The blonde isn't drunk often. He's not a fan of the taste of alcohol, doesn't like what it does to his head, doesn't the regrets he often has the next day. He's also awful at holding his drink, much to Yuri's amusement. Typically, he is only willing to drink after a particularly difficult battle or if he or Yuri has done something to be celebrated. Sometimes it's both.
When they're at the pub, Yuri knows to keep an eye on Flynn. As long as the knight only wants to laugh and play cards, Yuri is content to keep quiet and occasionally challenge him to a game of poker. But after awhile Flynn's eyes change, his glances becoming more and more fevered, and he shifts his body in a certain way on the barstool.
The moment Yuri notices this he stands, makes an excuse about it being late and him being tired, and drags Flynn back to wherever they are staying that night.
As soon as they enter the safety of their room, Yuri is shoved roughly against the wall, and Flynn has no hesitation in pressing his lips against Yuri's. The black haired man feels claustrophobic against the wall with Flynn's arms on either side of his head, but the flurry of Flynn's kisses and fingers makes him dazed enough to stay put. Wrapping his arms around the other man's neck, Yuri pulls Flynn deeper into the kiss, the taste of alcohol still on the blonde's lips. Flynn's fingers pull the tie from Yuri's long hair and his hands pull Yuri's shirt from his chest.
Yuri lets out a small yelp of surprise as Flynn lifts him up, and he wraps his legs around Flynn's waist automatically. He knew the other man was strong, but Yuri isn't the smallest person either… But Flynn seems to have no trouble keeping him up. Yuri can feel Flynn's cock pressed against the curve of his ass, and he hefts his hips up. He keeps a hand on the other man's shoulders to steady him even as his back is against the wall, and the other he uses to guide him onto Flynn's cock. Past the initial tug and oh, gravity is his best friend as all of Flynn enters him with ease. It stings a bit, but it always does, and alcohol lessens the pain and enhances the pleasure.
Flynn's eyes are glazed over from drunkenness, and Yuri moves himself as he feels the pleasure to bring them both to fruition. Flynn huffs and his nails rake along Yuri's back, the pain only increasing the desire, and when Yuri comes he can taste the lingering flavor of wine and bourbon and Flynn's kiss.
Really, Yuri doesn't mind it one bit when Flynn is drunk.