Zizhen's eyes widen at the suggestion and he flushes crimson - he's a little more experienced than Jingyi (in the theory, anyway, he hasn't had any practice) but he's still far more innocent than Jin Ling is. Still, the embarrassment is just as much about how much he likes the idea as how flustered he is by it.

He coughs awkwardly, trying to push the mental images out of his mind (but not too far out, they were worth considering), and gasps at the suggestion.

"No way! Hanguang Jun would never-" he pauses "I mean, obviously the oil, but-"

But it's surprising enough that Hangjuang Jun even lets Wei-qianbei stash that stuff there, and maybe they do like to enjoy those books together - the idea of sharing some of his own collection with Jingyi sends a little thrill of excitement through him, so why shouldn't Wei-qianbei share his with his husband?

"...maybe, but I don't want to think about it. It's weird enough to think that he even has sex."

(They all know he does, unfortunately, Wei Wuxian is not a subtle man)