1. When you don't use them.
2. No
we had intercourse. I am unsure if the condom we had used was compromised in any way.
What would make the circumstances "not safe" with a condom?
Had the condom failed you wouldn't be saying unsure you would know without a doubt.
I am aware of that. Would the remote chance that he a fraction of the condom on withdrawal compromise my safety?
What I am trying to say is this...besides a condom "breaking" or "slipping off during" sex, what else am I missing that would make condom use "unsafe"?
You did not have an exposure.