text: I guess it could be possible that sex could increase your glucose.... especially after ejaculation.  When you ejaculate there is a rush of epinephrine and norepinephrine (adrenaline).  This causes your heart to race, blood pressure to increase and also your liver to release glucose from glycogen.  I am assuming that you are a diabetic... for most people, sex does not alter blood sugar at all (because the body is very good at keeping blood sugar constant... that is, unless you are a diabetic).