What happens when you put your finger in your horses ear

Yeah I was cuddling with my horsey Giddish and she really liked the earmassage xD. She’s 6, but at heart she’s still a filly. The shetty (she’s really big for a shetty but yeah...) standing next to her was sleeping xD. Giddish isn’t techically my horse, but I ride her and take care of her ’cause the owners don’t have enough time. It was raining today so I decided to just stick to cuddling in stead of riding and she didn’t mind at all :).