Why? if it's not a good thread, I will delete it.
Well, I agree with you on the topic, just think its about the shortest post I've seen from you...
As per topic, I've had a few in hobby and real world.
In real world, it can get awkward (especially when its with your gf and if she has insecurities) and if you do with another guy, your insecurities may be challenged.
In hobby, i've only had 1-2 that I thought were amazing (Byanka+Maria oooffff) but unless you take multiple hours / entire evening, its a lot going on in such a short time and unless the 2 girls are into eachother for real, it can be really awkward.
I don't even look for duos in the hobby world anymore... perhaps I'm getting too old