hahaha! well a date does not necessarily mean it will end in sex. Date is merely a get together and can be plutonic in nature. "going out" can mean seriously dating or simply getting out and going somewhere such as a movie or restaurant. Tush, bum, derriere, ass, butt, keister, etc, can all apply to the cheeks that support your body weight while sitting!

so if i am corectly to understand your previous question, the translation would be " would i like to go on a butt?" well now, what would have in mind?! shall we sit back on our keisters and shoot the breeze? Oh boy, another yank term!!!