I have a "male" butter BP that probes 5-6 scales, and I tried popping him, and only got two little nubs that did not appear to be hemipenes. My female het pied probes at 4-5 scales and my male het pied probes at 8-9 scales. I have successfully popped my het pied male numerous times, but I can't get the same results with the butter. Is it possible that "he"'s not well endowed, or is my male a female?
Also, the butter is about 350 grams. If I put him in with my het pied male, would they fight? Could this resolve the gender issue?