How do societal norms and upbringing contribute to behaviors like 'mansplaining,' and can they be changed?

Why would a married man make fun of single women for being single?
If someone was mean to you and they found out that you left and never returned, then will they find someone else to pick on instead?
What can I do to be more attractive to men? I haven't been asked out or hit on for some time now.
If you found someone you wanted to ask on a date, what would you say?
How often do you talk to your spouse about your real feelings?