I absolutely love Hamilton’s Commonwealth universe! Pandora’s Star then Judas Unchained, then the void trilogy followed up by The Abyss Beyond Dreams. I’ve read all of them 3 times and thinking of doing a 4th round soon!

I’ve also seen House of Suns mentioned here a few times. It gets my vote for the exploration of deep time due to the speed limits of causality.

Yep! peeing on each other, in each other, on our faces. Getting downright KINKY! Just wicked red hot wet sex. My last long term girlfriend and I enjoyed it sooooo much.