Well, yeah, that's why I put dabble in, I figured most people would figure they switch. I tend to see Ianto as a bit more on top than jack, myself, but it's all just for fun, right?
(I'm kind of regretting putting "monogamous" in there, yeah, or at least, I'm regretting not adding "serious, committed and polyamorous" to the list of choices, becasue I keep shouting at people about polyamory and serious commitment not being mutually exclusive and now I've shot myself in the foot by not including it as an option.)

I WAS inclined to go with Gareth as well, but the more I think about it, the more I'm not so sure and I think he's probably dabbled. Drunkenly.