Montgomery Scott considered himself to be as open minded as they came. Being stuck on a deserted planet gives a guy a lot of time to think, so think he did (Mainly about sandwiches, but a man needs solid food. That was a fact he would swear by.) He liked to think of himself as someone who'd seen it all, done it all and couldn't remember most of it, so he was really in no place to judge the indiscretions of others. He'd also discovered, not two days after being on the Enterprise, that this new crew of his used his open minded-ness, a trait which had been looked well upon but not invaluable, to turn him into a veritable guru in terms of confessions.
Two of the many patients his listening ear had endured were the Cap'n and his First mate. Now there was a disaster wrapped in duct tape at no mistake. They were both so damn reluctant to talk to each other it was nearly unbelievable. Over time, they'd gotten over it, and no one had been more pleased than Scotty himself to learn of the two finally coming to terms with whatever it was they decided lay between them. The Cap'n and Mister Spock deserved happiness, and if they brought that to each other, Scotty wasn't about to throw stones and just enjoyed the non existent tension on the bridge nowadays.
Another visitor to his engine room was one Doctor McCoy, CMO and snarkiest bastard ye ever laid eyes on. Now o' course, Scotty adored the doctor as both a man and a bar tender, and thought it sweet that he be so concerned about Lt. Uhura after her break up with Spock. What he hadn't seen coming was McCoy banging on his door one evening, and fretting to him for an hour over a dinner date between he and Uhura. However, he'd rolled with the punch, and encouraged the CMO as best he could, given that he'd had a long day and more than his fair share of the spirits on McCoy's top shelf.
He'd been on the deck, catching up with the Cap'n on all things ship like and had been shocked to see Chekov and Sulu walk onto the deck, calm as you please. Holding hands. Scotty, amazed at the lack of response from the crew, gave the Cap'n a look in question. Though the Cap'n had been too busy having a conversation with the back of Spock's head to answer his unspoken question, Scotty got the gist of it. What with he and Spock's long awaited awakening, and McCoy and Uhura's unforeseen but surprisingly pleasant meeting, there really wasn't a senior officer on deck who gave a damn about the frat rules. Seeing how happy the two lads were, Scotty couldn't help but go through the rest of his day with an idiotic grin on his face.
Yes, Montgomery Scott was as open minded as they came, and he was damn proud of it. But...
He closed the door to engineering with a loud crash and a muffled curse that he was sure would have earned him a cuff upside the head from his mother had she heard him. He was all for free love and all that rot, but he drew the line when it came to engineering. And as he wrote the memo for the Cap'n to read after he disentangled himself from Spock and removed themselves from the engineering sector, he swore to himself that if he caught one more couple having sex in his engine room one more bloody time, so help him, he would not be held responsible for his actions!