Why wasn't it revolutionary? Why couldn't it be unique? Sure it wasn't just them that had found a perfect fit in someone else but it was definitely the first time for Richie -- and maybe Eddie too so it was a game changer for them. And frankly, Richie didn't think it'd get old. This was special, and there was no harm or shame in that so much as it was something to be celebrated. Ideally with frequent orgasms.
Richie did feel a little desperate and he sort of forgot what frequent breathing was all about, more interested in shifting his hips for more of that perfect push and pull (even when it frankly got erratic) and arching his back so that they were as squished together as was humanely possible. It allowed for some pretty fantastic friction which was -- yeah. Good. There was only so long he could ride it out - the thought of Eddie fucking him alone was enough to make him almost explode so the real thing was ... a lot. Basically any angle that got something rubbing against his dick at the same time was enough to push him over the edge he'd already been teetering on. He wanted to say he had more control than that usually but these were extenuating circumstances. Plus he'd just been dead. He was allowed.
Later, he'd think about how gripping Eddie tight and making a truly epic mess between them was quite possibly the hottest moment of his life.