Abstract Sexually potent and sexually sluggish/impotent male rats were treated orally with different amounts of Turnera diffusa and Pfaffia paniculata fluid extracts (0.25, 0.50, 1.0ml/kg). While having no effect on the copulatory behavior of sexually potent rats, both plant extracts singly or in combination improved the copulatory performance of sexually sluggish/impotent rats. The highest dose of either extract (1ml/kg) (as well as the combination of 0.5ml/kg of each extract) increased the percentage of rats achieving ejaculation and significantly reduced mount, intromission and ejaculation latencies, post-ejaculatory interval and intercopulatory interval. Neither extract affected locomotor activity. These results seem to support the folk reputation of Turnera diffusa and Pfaffia paniculata as sexual stimulants.