The edibles which are prohibited in Islam are
clearly mentioned in the Qur’ān; sheep’s testicles are not among them.
Therefore, they can be eaten. However, it is certainly not imperative to eat
them; if you feel an aversion to a certain type of food you can refrain from it
but you can’t stop others from eating food items that are not forbidden; do keep
in mind that people have varied tastes regarding food; what may seem unpleasant
to you might seem very delicious to others.