I believe especially in being warm-hearted in love, in fucking with a warm heart. I believe if men could fuck with warm hearts, and the women take it warm-heartedly, everything would come all right. It’s all this cold-hearted fucking that is death and idiocy.

The speaker contrasts sex as a merely mechanical act with sex as an expression of genuine human warmth and mutual recognition. “Warm-hearted” here implies tenderness, emotional presence, and ethical regard—an insistence that erotic life should not be severed from feeling and responsibility. The condemnation of “cold-hearted” sex as “death and idiocy” reflects a broader Lawrentian critique of modernity: when bodily intimacy is reduced to appetite, conquest, or technique, it becomes spiritually deadening rather than life-giving. The passage also suggests reciprocity—men’s and women’s attitudes must align—so that erotic relations can become a stabilizing, restorative force rather than a symptom of alienation.