...it is not really for me...& I have rarely seen it work.
..we used to have an open thing, when we first started datin'/hangin' out...& I realized, (whilst fucking a friend of mine) that sex without O_M_G, hmmm...it just ain't as fun, nor cool.
.....NOW...We have the whole triad thing goin' on...& a WHOLE LOT of peoples totally mistake that for an open relationship, & try to like, hit on my Wife, & Girlfriend...like, with barely even knowing us......the young Ladies that hit on me all hear he same refrain, "That sounds nice, but, you wanna' talk to me Wife SHE, sets up stuff like that, Darlin'...", works like the charm, & they run away...girls, get the picture easier than boys ...boys are dumb, oK...
...I would recommend, telling them to quit trying to put you in the box their mind is, it is a small cramped box for someone with such wild wiles.....OR, ignore the ignorant, judgmental, ass hats.
..also, a simple, "FUCK OFF!" can do wonders now & again...