Nature V. Nurtue

So my girlfriend is spending the weekend here at my place and since my roommate is away on a retreat she brought her puppy (he's six but still...) with her to meet my little guy.  Now she had pre-warned me that her dog (we will call him Q) is a gay dog.  She also told me that my little guy shouldn't have anything to worry about since Q tends to go after big dogs-but he can't reach.  They show up and of course my dog has personal space issues (not unlike his owner) and does not under any circumstances want Q sniffing his ass.  Fast forward and hour and they are playing fine until Q goes to sniff his ass and my dog goes apeshit.  Apeshit people. Ape. Shit.  Fast forward three hours-my dog is now chasing Q around the house, showing Q his junk, licking and sniffing his ass.  Fast forward another two hours.  Our dogs are getting down in the middle of the living room floor.  Um, yeah they go at it for quite a while.  Yeah....

This morning we decided that my dog's temper tantrum was his was of saying, "I'm not gay!" but he's a total queen.  This morning he was prancing around, bringing Q toys, following him around, etc.  My dog has got it bad for Q, who hilariously wants nothing to do with him this morning further proving that Q is a player and my dog is now his bitch.  

So the question begs to be answered-are our dogs inherently gay or are they a product of their gay environment?  Ultimately it doesn't matter, we love them just the way they are...and at least everyone in the house got lucky last night :-)