Im a lil confused

Im 21 and still a virgin but I like to watch the sex scenes on tv and my brother has gay pornos I used to watch and I used to watch the real sex show on hbo almost every second of every day I feel like I wanna do it or masturbate but im scared to. Why is...

my body and my hormones so full of lust and horny but my conscience is scared to do anyhing

It's because it is a natural human instint to want pleasure. There is nothing wrong with masterbation. Find a quiet place, where you know you won't be disturbed and learn to enjoy yourself. Because if you don't, when it is time to have sex, you won't know what you like. And the more you know what you like, the more pleasureable it will be when it happens.

You're aroused simply because it turns you on.
Feeling guilty is normal for a lot of people.
Its usually because they're sheltered from the idea of sex growing up.
Maybe you were probably brought up thinking sex was something forbidden and maybe even wrong.
You just need to rewire your thinking.