Is it normal to think like this?
I'm a 18 year old male, I'm sorry in advance for a long post but I don't know if there is something wrong with me or not..
At a young age of about 11 I had a friend whom I used to visit all the time and play video games. He began this habbit of teasing me by pulling out his penis and making me touch it, at first ofc I didn't like it and always removed my hand, but slowly I began growing tired of this game and stopped removing my hand and simply let him hold my hand on his boner while he played games..
After a while I began rubbing his crotch underneath the desk everytime I visited him, slowly pulling his cock out of his pants to casually rub it while watching him play on his pc. A while later, and a few porn videos, I began wanting to taste it.. once I sat underneath his desk, rubbing his dick like normally but then managed to reach for it with my mouth and suck it gently while jerking him off. Anyways, everytime I left his house, I felt horrible, like I was disgusting and worthless for even thinking of him this way, but every time I took a shower or masturbated, I couldn't help but to think of his hard cock till I reached climax and cummed, afterwards I felt bad again and tried to forget about it. This went on for like 3-4 years of me wondering if I was gay, bisexual or just straight with a strange fetish.
I am now 18, I believe I am bisexual although I have never had sex apart from jerking him off and giving him oral, I now barely talk to him, and have never kissed anyone, girl or boy, I have though been finding new interest online like incests and furry, the thought of a big horse cock cumming all over me or the fucking a dogs warm pussy excites me deeply, aswell as the thought of my older sisters naked body.
But sadly once masturbating over those thoughts I always find myself feeling bad and ashamed, like it's wrong of me to think of those things, I just want to know if this is something I should seek help for or if I shouldn't feel bad about these thoughts..
Please give me some advice in the comments..