I adore having my balls played with. Whether it’s a nice massage or rough grabbing it’s amazing. Certainly find that balance with what you enjoy but it’s worth it.
I’ve also got a vibrating ball toy that feels amazing to use during sex. Adding that little bit extra 
My husband loves my to suck one or both balls into my mouth as a prequel to licking his length and sucking him. I prefer it when his ball sack is shaved 
I love my balls played with and sucked. We have watched a couple of new videos recently that the female’s technique in sucking balls was amazing. Wife has been totally into sucking my balls even more. Lately she has been sucking them from behind while I am in all fours. Amazing feeling as she sucks then both into her mouth. I too keep my balls shaved which she loves.