I found out about this a while back, and it's had me on edge since. The reason - it's dangerous. The reason it's dangerous - it works.
I fall in to the category of people who argue that sarging a girl with a bf is ok, but I think there is a lot of glossing being done that puts a positive spin on this. Afterall, this is placing temptation in front of a HB, and tbh another pua could easily run this technique on your gf and win her over.
This leads to the counter-argument that if she's good for you ie faithful, then there will be no problem, but the thing about SMT and bf destroying techniques in general is that you're creating weakness in boyfriends that no man can fulfill in the first place (leaving the possibility of MAD - Mutually Assured Destruction). No man should fulfil his gf's every waking needs and desires - it's just not plausible! So what's happening here is you're raising a guy's status above it's proper place, then she's reasserting his place by bringing to light all his (and every other guys) downfalls.
Fair enough when AMOGing to use this technique, cos nobody is losing a partner in the situation, but if this happened to me with my gf because some ambitious pua created a perception of my failure to meet these incredibly high, non-existant standards then I'd be pissed.
Now I know I started this saying sarging a girl with a bf is ok, and yet I've rambled on about the negative sides of doing so. Now the other side of the coin.
Most relationships are doomed to failure, by simple statistics alone. Nobody I know has found the perfect partner in their first 10-15 relationship, ergo throwing a figure of under 10% success rate already, so chances are you wont be stopping prince charming wedding his princess who-cares-what-she's-called. Also, the whole fidelity thing. If a girl is going to cheat, why not make it with you, right? Yeah. I agree. But I wouldn't destroy the image of the bf that she has doing so. Do it by promoting your qualities (prefereably the ones you actually have
). I've been with two girls who've had bf's at the time (does a 3-some really count?) but in no way did I do this by destroying the bf.
Remember, you raise her standards, you've got to live up to them. The really apt use of "you've made your bed, now sleep in it" maxim hits the nail on the head. You've been warned.
(BTW I'm aware that I refer to it as destroying the image when actually you're raising the image and then allowing her to destroy it, but just take it as meaning that pleeease
Anyway, just wanna finish this with an 'I-hope-I've-not-offended-anyone-and-if-I-have-please-reply-and-I'll-clarify' disclaimer.