Anyone unknowingly given a bj to someone who'd had sex earlier and only realised through taste?

Anal/vaginal.
If so how was it.
Gross or a turn on?

 

I once went down on a FB who had said I was the only guy she was playing around with and who wanted us to become more than just FBs.
I thought it strange when I could smell condom.
I didn't say anything about it because I didn't want to make her aware of that warning sign so others might notice it too.
That's the one time my attitude changed such that, instead of giving her pleasure I secured my own.
Sometimes I regret being so reactionary.