Cannot fuck; dick is limp

Why is it that when I try to have sex with a girl, my dick always goes limp? I can masturbate just fine, even to 3D (not actual porn though). I hate this shit. Why does this shit always happen to me? Why must I be sexually divergent? I just want to have some fun. I am tired of anime and video games; I want to get a life, but it seems "normal" life is not suited for me, despite me appearing "normal" to everyone else. Do I just have to let a train run over me and see what happens? It seems inevitable now.

>>7
#define SPIDER_FACE (;;)
#define LEFT_HUG (
#define RIGHT_HUG )
#define LEFT_CUDDLE {
#define RIGHT_CUDDLE }
#define CRYING_EYE ;
#define TEAR ,
#define LOCOMOTIVE(wagon0, wagon1) wagon0##_##wagon1
#define ON_RAILS(wagon0, wagon1) LOCOMOTIVE(wagon0, wagon1)
#define THOMAS_THE_TANK_ENGINE(choochoo) ON_RAILS choochoo
#define KIRISAME_MARISA RIGHT_HUG RIGHT_HUG

void penis LEFT_HUG RIGHT_HUG
LEFT_CUDDLE
        for SPIDER_FACE LEFT_CUDDLE
                if LEFT_HUG THOMAS_THE_TANK_ENGINE(LEFT_HUG THOMAS_THE_TANK_ENGINE(LEFT_HUG attractive TEAR female RIGHT_HUG) TEAR sighted RIGHT_HUG) LEFT_HUG KIRISAME_MARISA
                        THOMAS_THE_TANK_ENGINE(LEFT_HUG erect TEAR penis RIGHT_HUG) LEFT_HUG RIGHT_HUG CRYING_EYE
                if LEFT_HUG THOMAS_THE_TANK_ENGINE(LEFT_HUG bladder TEAR THOMAS_THE_TANK_ENGINE(LEFT_HUG is TEAR full RIGHT_HUG) RIGHT_HUG) LEFT_HUG KIRISAME_MARISA
                        urinate LEFT_HUG RIGHT_HUG CRYING_EYE
                else if LEFT_HUG orgasming LEFT_HUG RIGHT_HUG RIGHT_HUG /* 'else' so we don't ejaculate and urinate at the same time */
                        ejaculate LEFT_HUG RIGHT_HUG CRYING_EYE
        RIGHT_CUDDLE
RIGHT_CUDDLE