I've been finding various ways to apply innuendo since its so damn effective. In my eyes, you can't argue with sarcasm and you can always argue interpretation over intent. Finding sly humorous ways to tease her with innuendo is not only really, really entertaining, the more you mess with her head, the more turned on she gets. I've found even if i just have a regular conversation and i just accentuate the end of words as if i were making an innuendo she'll start to get a bit hot and bothered about it, like she can't say it out loud because theres no behavior specifically to call out. And if she says "why'd you say it like that?" i'll be "like what" all nonchalantly and she'll be like "like, you know... ugh, never mind". She might even start to doubt that the innuendo is coming from you and you just gently guide her to the conclusion that the one with the filthy mind is her, and shes just THINKING you're saying innuendos because shes a pervert. In fact, regardless of what she thinks, if you just reassure her you believe this, she will begin to even play with the notion humorously. If you are alone together this works great. If you do it around others, have a friend back your ridiculous ideas up. It always sounds more credible coming from 2 people. Once you're further in and shes giggling at almost everything you say, you start laying it on thick with the innuendo of all innuendos, what i call "Stuffing Muffins up an escalator". You begin to talk about sex, or kinky shit, or being adventurous and then kinky shit, or you tell her this surprising statistic you just learned that young people in our generation actually have 1/4th as much sex as young people in the 60s, but somehow you jump from that conversation to talking about "Stuffing Muffins up an Escalator". Sounds dirty, doesn't it?
Stuffing muffins up an escalator is actually NOT a sex thing. Its an after sex thing.

Meaning AFTER sex, you tell her that stuffing muffins was complete bullshit just to make her wonder what it was and if she could find out once she got in bed with you. And if she asks, hell yeah you're going to show her what stuffing muffins is. And once you get her in the sack you say well first you have to get into this position, yada yada, and shes just an obedient little doll to your twisted sex mind games until you've had your fun and you tell her stuffing muffins up an escalator is simply the act of fucking with a girls head until she has sex with you. And at this point she may pounce on you out of sheer sexual frustration and try to punish you for teasing her so.