It’s actually not - it’s risk assessment. Identifying a risk and trying to mitigate it as much as possible.
Driving is dangerous and many people get in accidents. For a parent, knowing an accident could leave their child without a parent but also that some car journeys are necessary, it might look like this. No more non-essential journeys and for the essential ones, always driving carefully and not taking risks on the road.
Sex always carries risks. For a parent, there’s pregnancy and STIs, and either could have an adverse effect on existing kids. But on the other hand, a sex life may be very important to the parents. The risk assessment might look like this. The more partners I have, the riskier sex is - no more casual sex without double protection. If I’ve just one partner of several years and we’re both monogamous and I trust that that’s the case taking into account their personality/behaviour, AND we’re both prepared for unexpected pregnancy, then just the pill will do. If we’re not prepared for another baby, then double up on protection is the only way.
Thats how risk assessment works. What you’re doing is “loads of people cheat even in long term relationships so I’ll just not use condoms with any of the various people I’m having sex with”. That’s not good risk assessment.
Your risk assessment skills have been shown to be poor in other areas - allowing strange men to sleep in your house with your daughter and believing there’s no risk because you’re present, being the obvious example.