Oops, sorry for the double post.
Okydoky, Ha, okay sorry, I didn't get what you were meaning there. But yeah, a definite 'no' on the hands-free attachment. Also, the particular model I have is very heavy, so much so in fact that I don't see even most tight boxer briefs holding it in place, it'd probably wobble and wouldn't provide a solid base for thrusting. On that note though, I don't see most dildos working well with just underwear, the bases tend to be tapered for an O ring and beveled a bit. Even the Goodfella would probably poke into one's pubic bone uncomfortably. The only dildos I've had any luck with in underwear are the double ended kinds, like The Share.