Does anyone here (men) have a firm grasp on why we like getting ball busted?

Is it the pain? Or the humiliation? Or being submissive? Something else?

I don't think I like the pain at the moment of impact, but I do like it when my balls have that achy-soreness later. I absolute favorite sex is when my wife makes me pleasure her before bedtime. I'll go down on her while she squeezes and punches my balls until she cums, then she goes to sleep. I love laying there, still hard with my balls aching!

I know I like the humiliation aspect, but I associate that more with having a small penis and PE. As in, the only sexual stimulation I deserve is having my balls whacked. I don't really think I feel it is humiliating that a girl is beating me up or anything like that. In fact it baffles me to see guys who have big cocks getting their balls busted.

I am a submissive to my wife, in fact for a time in our marriage she rutinely cuckolded me with a well hung friend of ours, and currently we practice an FLR. But, I don't feel like I am "submitting to her desire", because we both enjoy this.

I'd love to hear others thoughts on this