nothing wrong with LEGAL and MORAL birth control.
sex is for LOVE.
love leads to a marriage (eventually).
lust is sex just for sex (no love)
pure carnal desires lead to abortions. (or can)
stopping conception is better than committing murder.
abstinence is best until you attain love with someone. (the person who you would die for)
sex is to please your mate ...
this is a two way street (this desire).
each time you have sex, you are not planning to have children.
some people confuse what the bible says and shows about this subject.
so i am glad you asked.
one subject this comes from is onan.
the topic was about kinsman redeemer. (not anything else)
raising a child for your dead brother was the law (at one time).
he had the sex, then cheated on giving her the conception for this.
he spilled his seed instead.
he was thinking about sharing inheritance (he was thinking about $$$$$$),
not about pleasing GOD and his new wife.
this was lust for him.
love was not even a part of this at all.
the story of ruth shows the same thing.
that is a love story.
Gen 38:8 And Judah said unto Onan, Go in unto thy brother's wife, and marry her, and raise up seed to thy brother.