"Well, ... It's not much of a tale."

"I'd like to hear it anyway." At least if the alternative is his grabbing you and ...
Or maybe not. His lurid intent may not have changed, but your worries about it have definitely lessened. You aren't sure why. Maybe that soap and shampoo have some erotic effect. Maybe it's just that even with a few minutes exposure, he has scored well with you. You are still a long way from inviting him into your bed, but the idea of him climbing in is definitely less terrifying.

"Well, I guess...if you really want..." After you assure him, he continues "I had the hots for Becky, and I thought she did for me too, but when I made a move on her, she pushed me away, and when I asked why, she claimed she was a vore and she didn't want to eat me. I figured that was just an excuse, that she was playing hard to get, so I told her an hour in her arms was worth the rest of my life in her belly. That's the sort of thing you girls go for, right?"

"Well, yes, but I would think you were just trying to snow me."

"Well, that was what I thought I was doing. She was suspicious too, and I had to assure her several times before she agreed to smuggle me into her room.
"Things went fine at first. We got naked and onto her bed where we started playing around and having a lot of fun with each other's bodies. Then out of the blue, she just opened her mouth real wide and swallowed my head.
"I was surprised to find she was telling the truth about being a vore, and even more surprised to find I had been telling the truth too. Instead of panicking and trying to escape, I just figured the hour was almost over, so I had to rush.
"I got between her legs and into position. Becky told me later she was concentrating too much on my taste to do anything to stop me, but she seemed eager to me. So a moment later neither of us were virgins any longer.
"It hardly took me any time to shoot off, and when I relaxed after that, Becky resumed eating me. That would likely have been the end of me, but I started thinking it wasn't fair that I had got off and she hadn't. I can't say that was really rational, but it was an emotional time. So I started doing everything I could to excite her. She definitely enjoyed that, slowing down whenever I managed to get hold of sensitive areas, but it got harder and harder to touch her as more of me went inside. I tried hard. I was using my toes to masturbate her at one point. But I just couldn't get her to climax and ended up curled up in her belly.
"I still was thinking she was getting a raw deal, but I couldn't think of what I could do about it. Then I realized I was only a few inches from her treasure. Could I do her from inside? It seemed worth trying.
"I had to quite a bit of squeezing and hunting, but soon I was caressing her most sensitive area. So was Becky, once she got over the initial shock. Under that double stimulation, she got the biggest orgasm of her life.
"Unfortunately it was also the loudest. And her mom happened to be right outside the door. She broke in and freaked. She insisted on getting me out despite my objections. Given that getting out meant facing Becky's parents accusing me of raping her and forcing myself down her throat, I still think staying inside was the better fate. But out I had to come.
"There was all sorts of fuss, but in the end, Becky was sent off to some vore school, and I had to talk with this crazy psychologist, who decided I was a lunch."

"Lunch? What do you mean?"

"Well, actually he used some twelve syllable name, but it means I have no fear or objection to being eaten and digested. A lot of you vores have this too. He said there are worse and better cases of this than me. Those called breakfasts have an eagerness to be eaten and are eaten real quick. The light cases are called suppers, and just don't have as much fear as a normal person. So they last a lot longer than a lunch, but usually end up eaten anyway.
"Anyway, as a lunch, everyone decided I was as good as digested already, and sending me here was a reasonable choice. And I agree. I think I am going to really enjoy it here."
This last is said with a gleam in his eye. If you don't want him enjoying you here and now, you had best do something to delay him some more. But what? Maybe tell him your story? Sounds reasonable. But maybe something else...