The Erotic Arata is a sexual act. To preform The Erotic Arata you need a trampoline and a sex partner. You both jump on the trampoline for a little bit. Once you both have a decently high jump one of you tries to boost the other up giving him a abnormally high jump. One of the sex partners then falls back while pulling their pants down. The other while in the air pulls their pants down and aim their fall so that there is vaginal penetration or anal if you're into that.
"Dude can you let me borrow your trampoline? I want to try to Erotic Arata my girlfriend."
"Yeah man be careful. You can break your dick doing The Erotic Arata."