I can't stay inside more then 30 seconds. Though I am not a use to have a fatigue(mental or physical) also I play mind trick(counting in mind while intercourse, or thinking about other matters) but stil 30 or 40 seconds are max, I cant go more, while she has to suffer(because she remain charged)
I don't want to use Viagra because its expensive(I can't afford 3 tablets a week) seconds I am prone to heart disease(because I have Marfan syndrom)