Dipper is cute. Imagine if he dressed up as Mabel and flirted with boys "as a joke". That'd be cute and he could pull it off because they're twins, all he needs is some fake braces.
Chat Noir is one I would do very very very dirty naughty, steamy things with, same with Kenny. A lot of panting, feeling rubbing, biting, just a lot of really really lewd foreplay.
I love girls too, moreso than boys most of the time, but theres just something special about dominating and making tender, passionate love with a feminine boy.
I totally understand why the Samurai and Greeks and Romans would be all over twinks, they're great, and 2D/animated ones are the greatest of all.