For me personally, I wanted to know after A #1, everything. But once I knew they had each 'gone down' on the other, it was hard when we were intimate not to think of that. Or to think I was putting parts of me where someone else's parts had been (sorry if TMI)
So I am personally more interested in how it happened, what thought process he used to justify it and make it okay to go back a second, third, fourth time, etc. BC it is one thing to have a total lapse in judgement, do something out of character, and wake up the next day feeling terrible about it and never do it again. But to view the A in the light of day, and continue to engage in it, I really am curious how the mind/conscience allows that to happen.