That cunnilingus with a diabetic leads to rise in sugar levels is a myth. Self assumptions are fraught with risks. Oral sex with the female vagina is called cunnilingus. It’s a form of sexual variation used by couples from time to time. It’s usually used as a part of foreplay to increase sexual stimulation. It may lead to orgasm in some females.
Diabetes is not transmitted sexually; hence there is no harm in having oral sex with a diabetic. Diabetes is a disorder caused due to malfunctioning of the pancreas. This leads to abnormal sugar levels in the blood. It may have genetic basis. Well controlled diabetes has no action on the sex life. Poorly controlled sugars can cause problems with sex desire and erection. It may also result in infections.