I've found it a mix between guys who LOVE it and guys who don't (sometimes because it does nothing for them, they're too sensitive, they'd rather the focus be elsewhere, etc). I love doing it especially when I can tell how much it drives someone crazy but I prefer to wait until a guy tells me it's something he likes before going all in. I have always been someone that prefers to follow directions than take the lead though lol.

It's like when I see guys making threads about specific things like using tongue while kissing and why don't more girls do it. Communication is always key. If you tell me how much you love getting your balls sucked, I might not ever get to feel what that's like myself but I'll give you an enthusiastic, thorough experience :P