Unless it's strictly G-rated (Doraemon, Anpan-man, ...), I'd guess that some suggestive humor is intended.
Do a search with [ ビクビク and ヌルヌル ] and you'll see ...
https://www.google.co.jp/#q=%E3%83%93%E3%82%AF%E3%83%93%E3%82%AF++++%E3%83%8C%E3%83%AB%E3%83%8C%E3%83%AB
( Every one of the top 50 hits is explicit material. )
I didn't realize that the expression ビクビク感じちゃう had become so common.
Ok, i now see that strictly G-rated manga, novel, story, etc.
would never use the combination [ ビクビク and ヌルヌル ]
並立助詞 ヘイリツジョシ ......... 現代語では、「と」「に」「か」「や」「やら」「の」「だの」など、古語では「や」「の」など。並列助詞。
出典 浮世風呂 滑稽 「着物がきたねの、貧乏人だのと」
http://www.kokugobunpou.com/%E5%8A%A9%E8%A9%9E/%E6%A0%BC%E5%8A%A9%E8%A9%9E%E3%82%92%E3%83%9E%E3%82%B9%E3%82%BF%E3%83%BC%E3%81%97%E3%82%88%E3%81%86/
(4) 並立語を表す(並立格) 「の」「に」「と」「や」がつく文節は、並立語になる。
(例)生きる の 死ぬ の と大騒ぎをする。
行く の 行かない の とはっきりしない。
Re: chocolate's comments (below). -- (I still have to re-read them.) -- chocolate's comments are excellent.
As chocolate says, I think they may be different.