You don't ever have to lose the lag intentionally. The winner of the lag can choose whether to break or not. ---- Winner's choice.
Of course! That wasn't really the question, as you may have noticed, but how to beat a guy who'll shoot at a white flag and make it (seriously, these kids consider cue ball and object ball on the same table = position) to the shot, elegantly concealing the fact that one is blind as bat on long pots (exaggerating, but you get the gist).
Greetings from Switzerland, David.
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„J'ai gâché vingt ans de mes plus belles années au billard. Si c'était à refaire, je recommencerais.“ – Roger Conti
Try to win the lag. That's what you're supposed to do. If you want to shoot the opening break shot, then win the lag and choose to break. It's the first shot of the game. Your opponent won't have a clue as to why you're choosing to break. It's better to start the game with integrity and sportsmanlike conduct rather than the opposite.
The winner of the lag determines who shoots first so it is always advantageous to win the lag. If you purposely lose the lag, your opponent could choose to break the balls.
From the WPA rules:
1.2 Lagging to Determine Order of Play
The lag is the first shot of the match and determines order of play. The player who wins the lag chooses who will shoot first.