Yea, of course, the emotional safety net grows and gets stronger over time yet the sexual activity will become less frequent. In the beginning it's exciting and you're full of anticipation (dopamine) but over the months or years it starts to dwindle and it gets comfortable and typical. That's why most guys start to look at other women and even start to make advancements. I think it's natural which is why I'm an open side pussy advocate.
I've heard a lot of horror stories about military brides, aka the dependapotamus. The bait and switch definitely happens, but I think mostly to people who marry too young.
What in the world is a glory hole?
Edit: Nevermind found the wiki.
I'm thinking of trying M at a party at the end of the month, does it really make you wanna fuck really bad like people have been saying?