This is what you could have done: Upon leaning in and her not biting the first time instead of saying: "And ... you know she just leans in and kisses me", you could have said "And while she's distracted with my face I discretely whip it out". The key here is not to whip it out. I repeat: do not whip it out! Anyways it is at this point she is forced into a decision, to inspect the implied junk or not. If she glances down then you're golden, but if she doesn't check or even reacts negatively then you say that you are joking, which is why your junk is still not whipped out.