 [ Symptoms ] i would like some help extending my sexual stamina i last with her on top but really short in other positions when my wife is riding me i last few minutes but if i am on top or behind her i only last a couple strokes desensitizing condoms in the past made me lose my erection what can i do to improve my stamina [ Disease ] i do not know that age of your son but stomatitis is only in the mouth but if he is also having blister like lesions appearing on his hands and the bottom of his feet i would be highly suspicious that he has hand foot and mouth disease a coxsakie virus infection