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![](https://fry.gs/pictrs/image/c6832070-8625-4688-b9e5-5d519541e092.png)
It is pretty easy to tamper with a condom in invisible ways, from poking holes or letting it expire, to stealthing. Hell, you can even cook the condom at low heat for a while in its package and you will cause significant structural damage to it, without even bruising most packaging.
Even a freshly bought condom and a little sleight of hand can go a long way into tampering. No birth control is trust free.
Worked for me, turned gay. Five stars/zero kids.