The thing was, back then when he'd been watching, Ben hadn't been interested. Ghosts didn't get turned on by stuff, that wasn't a thing. What would he have done if he had? Ghost masturbate? Hell, Ben wasn't even sure how he'd aged as he had been, other than maybe it having something to do with Klaus growing up and getting older too, and maybe he just reflected that.
The point was, he'd seen plenty but now he'd have to rewind it all in his head a bit to decide what was worth giving a go and what he wasn't sure he ever wanted to try. Or maybe he ought to just try a little of everything to make an informed decision. That seemed like the smartest, most Ben thing to do, he thought.
"Oh," he said, a little surprised when Bill stood, and was even more surprised yet when he kissed Klaus and then moved around a bit to kiss him next. It was just a tiny little thing, but if Ben was pink before he was red now and he was silent for longer than was probably necessary, and when he did speak it was utterly useless. "Oh. Okay."