No, it makes the person sound arrogant.
No
MR.
If they have different surnames the man's name would be first. Otherwise it should say for example Mr and Mrs David Jones
yo man@man.com
No, you wont be registrated in the gobernments citizen information, if they wanted to investigate you.
A simple Mr President should be OK.
The title "Mr" is derived from the word "Master," which was used in the past to address a young gentleman or a man of lower social status. Over time, "Mr" became a standard form of address for men regardless of age or status.
A business letter to his/her place of employment should be addressed to Superintendent , to their home , as Mr. , Mrs. , or Ms. , if a social invitation.
Proper business etiquette dictates that the man should be first even with an informal envelope however many have used the woman's name first if she is more familiar to the sender. You address as the Man's name first. ei. Mr & Mrs Stephen Kariwiec
The correct way to address the envelope is: Mr. John Doe & Dr. Jane Doe.
If you are unaware whether a woman is married or not, use Ms. If it is a man, obviously, Mr. is used in all cases. so Ms. for a woman, and Mr. for a man.
On an envelope it should be written as Mrs. & Mr. the reason Mrs comes before is to gesture respect for your own spouse. What in Gods' name are you talking about? The correct response is Mr. then Mrs., and the reason is deference to the man of the house. Political correctness plays no part here.