I evolved from a hate to a love/hate of enemas from mom.
When I was young I'd not be happy about being told I was going to get an enema and sometimes a spanking was necessary. Early enemas were given over her lap, pretty much how she'd put me for a spanking and I'm sure the pants-down, then OTK routine for an enema wasn't made any better with the association.
As I added birthdays I found while still pleading with mom I didn't need an enema, pleeeease don't give me an enema, there was a growing excitement about it too. Aside from the obvious penis flag pole response, mom was able to pick up on other things. While my mouth might be genuinely claiming I'd had enough, no more please, the sort of moans that came out sometimes, and the rolling of my bottom and even moving backwards into the nozzle were indicative of my yin/yang feelings.
When I was older still I knew mom was aware of my yin/yang feelings. "Don't be silly," she'd say. "You know you need a good enema. They're not THAT bad, are they?" I'd say, "I still don't think I need one," and she'd say, "I think you do and if you just relax and let me give you an nice enema without fuss you know all that warm water can feel quite nice … so, let's do it."