The bull was old, but it still had enough energy to have a lot of sex. It wasn't what?\nOptions:\n- charge rider\n- bullbleep\n- female\n- cow\n- feeble
Step-by-step reasoning process below:
feeble
Feeble animals do not have enough energy.

Feeble animals cannot have sex.

Feeble is a physical state.

.

The final answer: feeble