That black one must be the female.
5 seconds sound clip from the Trading places (1983) movie soundboard.
You can hear this line at 01:37:17 in the Blu-ray version of the movie.
Quote context
[...]
- Sometimes, they look so human, it gives you the creeps.
- Boy, that other one's getting kinda horny, ain't he?
- Think we ought to hit him up with the tranquillizer gun?
- Oh, it's New Year's. Let 'em have their fun.
- That black one must be the female.
- Beeks. Are you there, Beeks?
[...]