I still don't fathom using WORDS as a practice stage for the jokes rather than the LOUNGE, other than feeling the target audience in that place wouldn't appreciate it or might ass rape such posts. Still, you could give it a try.
Taking this as another joke-practice, I'll agree RL's response was a bit funnier. I stopped in, as I misread the title (again) as "I want to date an open-mouthed ventriloquist..." which led to some splinter jokes, but I see I've been beaten to that point as well. Perhaps spinning a few punchlines towards:
Threesome:
...but I always felt like the third wheel (self deprecation)
...there was always confusion when she started yelling at the dummy (self deprecation)
...I always felt like they kept secrets from me and talked behind my back
...all the conversations ended up talking about how much fun she had with her last dummy, where they went, etc.
Voices:
...the voices in my head didn't like losing arguments
...but only if her 'voice' is in a sexy foreign language
...because I'm so used to having my women speak for me and what it is I really want
Sex:
...sex always freaked me out, to hear a voice talking but her "lips" weren't moving :D
...the blowjobs were amazing
...the blowjobs were amazing, but my penis always ended up crying/laughing_at_me (?)
...she always talked dirty to herself, I couldn't get a word in edgewise
...she had me convinced we had an invisible gimp in that trunk
...her 'toys' always start yelling to join in on the action and it ruins my concentraion