Straight men who were asked to fantasize shortly before ejaculation about their female partners cheating on them failed to produce higher-quality sperm, and men who were asked immediately after ejaculation to rate women’s faces found them less attractive.
Straight men who were asked to fantasize shortly before ejaculation about their female partners cheating on them failed to produce higher-quality sperm, and men who were asked immediately after ejaculation to rate women’s faces found them less attractive.