Oh BOY do I know how you feel about this one! Spraying...oh how fun.
We have three boys here...Fiver, Velveteen, and Teeny.
Fiver (an @ 1yo Holland Lop) sprayed me once on the arm, the first week he was here. We neutered him pretty quickly after, and he hasn't sprayed a single time since.
Velveteen (a mini rex) is about six months old, and just sprayed poor Emily (our 8yo daughter) in the face the other day, so he's more than ready for neutering.
Teeny is an almost 6mo old Flemish Giant, and hasn't sprayed once (though I don't expect that to last, lol), but due to his breed, won't be ready to be neutered for another few months.
We're going to get another boy here in the next month, Teddy, who is over a year in age, and a dutch bun...dunno if he's sprayed, but I supposed I could ask JAK Rabbitry (who has him currently).
As far as housing them together...I would never recommend housing two buns that aren't altered/fixed. The simple fact of it is that no matter if they're same gender or opposite, you're gonna have problems. Some buns don't get too hormonal, and might be more docile in general...but other buns get VERY hormonal and would tear apart another bun just for territorial reasons. I know that people often think, "Well, they've been living together all their lives...why would they fight NOW?!" The simple truth of it is...hormones make a bunny completely change in personality, preferences, and attitude.
With same-sex couples, you chance fighting...with opposite sex couples, I can guarantee babies. And something to keep in mind...buns have a pregnancy period of approx. a month. And they can get pregnant again almost immediately after giving birth. The mother can also mate with one of her male babies, so even weaning has to be timed rather perfectly.
It's really just so much of a dangerous idea to house two unaltered buns...I just wouldn't recommend it to ANYONE, no matter what the situation.
This isn't meant to be critical...I know there's lots of misinformation about buns out there, and I know how easy it is to hear one thing, and another, and not be sure. I don't fault people for thinking misinformation is true...it's only natural.
Just be sure to separate them as soon as possible, and when you do, to figure out their genders (you could even see if you have a rabbit rescue is near you, and ask them to check). And if you find out you have a boy and girl on your hands, check out the Rabbitry section on what to do for a pregnant bun, because you'll more than likely have a litter from them. But don't worry, ok? It's an easy mistake to make...and you're not gonna get skewered for making an honest mistake. We're here to help...and I would offer tips on what to do for a pregnant bun, but I'm not sure what to do, myself (no experience there)...so ask about that in the Rabbitry, and they'll help all they can, ok?
Hugs to you and the buns,
Rosie*