genophobia

So i was on google and decided to look up one of the issues that has an affect on my life:
fear of penetration. 
what did i find?
Genophobia...aslso known as coitophobia

Genophobia is the fear of sexual intercourse.

i like how this website (http://phobias.about.com/od/phobiasatoh/a/Genophobia.htm) defined it:

"Genophobia, also known as coitophobia, is the fear of sexual intercourse. People with this fear may be afraid of all sex acts, or only of intercourse itself. The term genophobia is sometimes used interchangeably with erotophobia, or the fear of sex, but the two conditions are actually different. Genophobia specifically describes fear of the sex act, while erotophobia more generally defines any fear that is related to sexuality."

Now how do i know i have this?

• well lets see: the idea of having sex with anyone makes me almost nauseous. 
• i have no desire to masturbate, but i wouldn't say i have no sex drive. 
• The idea of penetrative sex (even with a girl) makes me want to hyperventilate .
• Talking about sex really doesn't bother me unless its my sisters or my mom. but my friends? they can talk about sex till they are blue in the face and it really wouldn't bother me.  
• i can watch porn without having an issue but the very thought of me doing it makes me want to run in the opposite direction.

How do i know i don't have erotophobia?

• i can watch porn.
• i can kiss just about anyone. (enjoying the kiss is different)
• i can go to second base without an issue.
• sexuality as a whole doesn't bother me.

SO.

what are the causes?

• Rape
• molestation
• incest 
• insecurities
• other phobias (such as fear of viruses, fear of being touched, fear of nudity) 

well:

no.

i'm pretty sure no, but i can't remember everything of the situation clearly. 

NO.

eh i'm not really that insecure. any insecurities i have about my body/my ability can easily be/have easily been overcome.

no other related phobias.

so... no idea where this fear came from.

how the hell do i get rid of it?