Getting a vasectomy, or tubes tied is not taking responsibility.
It totally is. Not from std’s or promiscuity, but from having a kid they’d sooner abort, it sure is.
I see a bright and glorious future ahead, as libs implement Darwinian theory to make sure they go extinct.
It all depends on what your definition of “responsibility” is.
It’s extremely responsible if it prevents an unwanted child to be created and then murdered. That’s true whether people are married or not.
Moral responsibility is a separate issue when it comes to sin and sex outside of marriage.