[RjQoLCOSwiIKfpm]

It's a 0.07 mm piece of plastic which has to absorb the forces caused by two moving bodies weighing > 100 kg together. Thus condoms do and will fail, even if properly fitted. The failure rate is estimated between 2% and 12% pregnancies per year.

Or to put it in more visual words:

If you had $ 200 000 in cash (that's the cost of a kid), would you secure it against theft with a 0.07 mm piece of plastic?

It's insane that this is expected of men.

[sho_hn]

I feel like HN is the sort of forum where I can get away with being irritated by this. My inner mechanical engineer is rebelling.

Those two moving bodies are plenty squishy, and there's a lot of suspension absorbing forces there. There's also lubricant.

[RjQoLCOSwiIKfpm]

Even if much of the force is alleviated by that there's still enough moving kg's left to break condoms

- which we don't even have to discuss, because there is statistics about this, and their failure rate is quite high, as said between 2% and 12% (I suppose it's a range because usage errors and quality vary).

Google "Pearl index".