He had his code of honor damn it!!!!
She knew he would keep his word once he gave it damn it!!!!
She told him that she wanted something more than he offered...something not so vanilla....whatever that meant.....and as she walked Batman into the bedroom she made him promise on his word of honor....no X-Ray vision!!!!
But she didn't say anything about his super hearing......and what exactly was a "rim job" and why was Lois enjoying it so much?