[abossy]

Steve Pavlina is married, and he describes the effect his sleep cycle had on his relationship to his wife. I can't remember if he discusses sex at all, but you may be interested in finding out for yourself:

http://www.stevepavlina.com/blog/2005/10/polyphasic-sleep/

[zzzmarcus]

Steve Pavlina also became polyamorous after trying (and quitting) polyphasic sleeping. Infer what you will about his marriage from that.