Testicle size and potency is entirely unrelated to penis size, for all the men out there, and if you only ever have one partner you want to make babies with you don’t really need to be a super stud in the testicle department either… you just need regular sexual contact with your lady half.

But this shows that even if you do want all the ladies, large testicles don’t matter.

(Aside; people with breeder fetishes are fucking gross and weird. Musk is one such and just… eew.)