Put it this way, the first time I got high off Suboxone I was making out with my gf who had 2mgs worth of Suboxone under her tongue while we were kissing. We were making out for quite some time, and I accidentally got alot of her suboxone in my system.
I didn't have an opiate habit at that time but had some experience with them and took them whenever I could. Anyway, about an hour later I noticed my eyes were pinned and I felt kind of opiatish, I had dropped my gf off at work and called her panicking because I was so damn high! I was mainly afraid of passing out and not waking up.
I was high for at least 12 hours and felt it for another 12 hours (penis didn't work for a good 24 hours total), and this was all from "second hand suboxone". After the first couple hours I really enjoyed it and would sometimes ask my girlfriend for a crumb of sub after this experience... and I'd be HIGH off a tiny crumb.
So, moral of the story is, be careful, this stuff is STRONG! I got high as hell just from kissing my gf while she had the sub in her mouth.
Of course now I have a sub script and take them daily, wish I had the tolerance I had way back when! I take subs 4mgs at a time now.