This is quoting from some (bad) gay porn titled Manatsu no Yoru no Inmu that gained notice due to other circumstances. The scene involves one man criticizing his partner's technique, which angers him and makes him stop. When the man tries to get his partner to start again, the partner "rages" (with a very flat/monotone voice) at him. These two lines are quoted from part of that.
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Please don't fail on me and lose my comment again, Danbooru.