It's time to wash the ass

We sat with two friends in my kitchen. The wife is busy with children 3 years and 10 months. But then I decided to come to us and show good manners, t. E. To communicate with my friends. It should be noted that every day before going to bed the children is the procedure of their swimming or, in extreme cases, cleaning the parts of the child's body, which require the most strict hygienic care. And my wife, thinking that it is enough to communicate with my friends, saying goodbye to them, and said to me
 - I'll go wash my ass.
And I, as if nothing had happened, answer:
 - Well, go wash.
Can you imagine the eyes of my friends, after such a dialogue!