I was once dating two girls at the same time, they were friends and lived across the street from each other. They both knew I was dating, and sleeping with, the other one so it was fairly normal for me to spend the night at ones house, wake up and cross the street to the other ones. Fairly often I'd cross the street to find breakfast waiting for me when I got there. They would both look for my car at the other ones place and if it was there they knew I'd likely be over at some point the next morning.
That went on for a couple of years.
Sexuality exists on a spectrum and most people are far more open to exploration than they will openly, and often even privately, admit. Truth is that under the correct circumstances most people will play the receiver role in an oral only homosexual encounter at least once just to try it.
I might say yes and I might say no, depends on what my plans are for the event and where we're at in the order of events.