my gf and I were having sex the other day and she agreed to let me cum in her mouth then she said it tasted sweet initially with a tingly sensation after taste. I have a history of diabetes in my family and I have tried to watch my sugar intake, but I do have the occasional sweet/chocolate and I don't refuse if I get offered lol. I have been tested about 3 years ago via a urine sample and it came out negative, is it possible to develop it later in life due to my habits? thanks