You seem to be suffering from balanitis (inflammatory condition of the foreskin) with short front opening of the foreskin sac (phimosis). You may be feeling the heat and dryness during intercourse due to inflamed skin with cracks as you described. You need to have your blood sugars including glucose tolerance test to exclude any diabetic tendency. You need to be treated with antibiotics and anti inflammatory drugs for some days. Treatment of cracked skin with phimosis is usually surgical in form of circumcision.