Since you ARE an adult you have two choices - work very slowly to get over whatever phobia/fear you have and try it or just don't eat it. A lot of people have a fear of the unknown - ESPECIALLY when it comes to food. Remember, other people have eaten whatever it is you fear and survived (well, except that one guy..........
JUST KIDDING). I have a friend who is very sensitive to the smells of seafood and she just cannot eat it. If it is some sort of fear/phobia you really are missing out on some great food and I suggest you take tiny steps and start trying things. If you've eaten gator, reindeer, squid, etc. all you just said is invalid
and you are just doing yourself an injustice by pinning this fear on seafood! Unless you were once a chew-toy for a whale then seafood has never done anything to you to make you fear it