"We've been married for a bit over 3 months. I'd seen my husband with an erection while he sleeps but never ejaculate that way. It was during my period and I just don't want anything to do with sex. He woke me up moaning and talking in his sleep. I rolled over and he had his hand wrapped around his penis masturbating. I thought his other hand was on his balls, but realized he had fingers pushing into his butt. I asked if he was awake and all I got was another mumble that sounded like "ram it to me harder." Ram it to me harder? What gives? Was he dreaming about a man fucking him?"
Could be. He wouldn't be the first heterosexual guy to have sexual fantasies about taking it up the ass. Remember the prostate is the male g-spot. Sexual dreams are pretty common - especially if a guy may have gone a while without cumming. We get those nocturnal erections and any stimulation to it can turn a dream into a sexual escapade.
Maybe your husband is fluidly bisexual. You might want to broach the subject with him. Not in any accusatory manner, but like you want to help him enjoy himself. He might surprise you and ask that you get a strap-on. Lot's of straight guys enjoy it.
As Dear Abby has said, we need to keep things spiced up in the bedroom. As Dan Savage would say, we owe it to our spouses to at least try new things.