Yahoo email displaying inappropriate add

I believe you can also stop it with an email client such as Thunderbird. 

@bcau 

Yahoo email has been displaying inappropriate ads featuring scantily clad women in lingerie and g-strings. Is this how Xfinity is currently choosing to do business? I have to pay money to stop this nonsense? This is unacceptable Xfinity! I have screenshots of this inappropriate content.

You need to complain to Yahoo.  Comcast has no control over what ads Yahoo places in email.  Use an ad blocker or a third party email app.