Table 1.

Male and female genital arousal for all stimuli with means (SD) in z-scores

Stimulus	Males	Females
Heterosexual pair	1.58 (0.80)	1.36 (0.88)
Lesbian pair	1.07 (0.92)	1.17 (1.01)
Lions	− 0.26 (0.71)	− 0.15 (0.67)
Gorillas	− 0.35 (0.70)	− 0.29 (0.61)
Zebras	0.08 (0.65)	− 0.07 (0.68)
Budgerigars	− 0.41 (0.58)	− 0.34 (0.71)
Lizards	− 0.24 (0.53)	− 0.61 (0.38)
Chimpanzees	− 0.43 (0.75)	− 0.28 (0.61)
Hares	− 0.23 (0.61)	− 0.28 (0.82)
Crickets	− 0.36 (0.81)	− 0.24 (0.59)
Guinea pigs	− 0.37 (0.61)	− 0.23 (0.61)
Nature	− 0.08 (1.09)	− 0.03 (1.30)