I have done this, quite often, with the knowledge of my wife - 'You do whatever you need to come back safe to me'.
I worked away from home for long periods always under great stress, often dangerous, sometimes life threatening. The only (and best) way to hang onto sanity is sharing time with someone, over a drink, a meal and if that leads to making love, so be it. It does not imply a lesser love of someone many miles away, simply fulfilling a need to reaffirm you are still alive and functioning and able to continue..

We are poly. My partner & I have already discussed this & there are ground rules in place for encounters with others. I'd love for him to tell me all about it. There is usually a lot of humor & a bit of comedy in every encounter. (Edited to correct spelling error)

Don't ask, Don't tell ... lol

It's not cheating if I know about it beforehand...

Be good to know go find another. If you can't trust bye

Nope...to both questions...

That would never happen... He spends the night with me....

Yes, if we have an agreement to be honest about indiscretions. Having all the truth is important to be able to make a conscious choice to remain together despite the transgression, by forgiving, or to consider splitting up if trust is an ongoing issue. To not tell is to trick your partner into thinking you are honorable when you are not. To love someone and remain together despite weaknesses requires the truth, all of it.