I jam my hands in my pockets, because I know if I touch her I’ll be fucking her against the nearest tree before I know it.
Punctuation issues. When you have an “if statement” beginning a clause, it must have a comma. Also, because typically doesn’t take a comma unless the meaning of the sentence could be misconstrued without it. There are plenty on sources online that explain this. It’s probably okay here since you have that if statement here.
Should look like this: I jam my hands in my pockets, because I know if I touch her, I’ll be fucking her against the nearest tree before I know it.
