Answering the question:
“What is the best contraception?”
To empty your bowels, you need to sit on the toilet and relax the sphincter.
To release erotic tension in the pelvic floor area, a minute of masturbating in front of the mirror is enough.
There is a difference: do you want an orgasm or a child?
Having sex just for an orgasm is as inefficient as buying the latest iPhone to prop up a table.
Sex is intended for conceiving children, so no contraception is needed.
Or are you so reckless that if your child asks, “Did you want a boy or a girl?”, you’d answer,
“I just wanted an orgasm.”