Creed: In the '60s, I made love to many, many women. Often outdoors. In the mud and the rain. And it's possible a man slipped in. There would be no way of knowing.
From the same episode...
Michael: Listen man, I am so sorry. I had no idea.
(At first Oscar looks confused, then realizes what Michael is talking about)
Oscar: (looks around) Oh, it's fine.
Michael: No.
Oscar: (in a low voice) It's okay, it's okay.
Michael: No, it's not. I just- I feel terrible about it. I...
(Oscar vigorously shakes his head)
Michael: I have been calling people faggy since I was in junior high, and I have never made this mistake.
(The camera pans to Kevin who shakes his head)
Michael: If I don't know how to behave, it is because I am just so far the opposite way. You know? I'm just- I-I can't even imagine- the...thing. Maybe we could go out for a beer sometime, and you could tell me...how you do that to another dude.
(Oscar doesn't know how to react to that)
Oscar: That sounds like a great, wonderful idea. Let's do that.