Steven Universe - Hey kid, wanna fuse?

"Can fusions fuse?"
"You care to find out?"
"Can fusions fuse with fusions?"
"Uuuh…"
"If Steven fuses with a gem, can that fusion go on to to fuse with other humans?"
"I don't know what you're going on about, I just want to have sex."

Three's a crowd, but it's also a three-way.