I have a pretty disgusting sense of humour and I'm always making crass jokes, my gf is totally okay with it and even joins in sometimes.

She keeps this water bottle at night next to her bed so if she gets thirsty she doesn't need to go all the way to the kitchen to get water, but like she puts these dissolvable vitamin tablets in the water and they make it turn into a clear yellow. I always call it her piss bottle, and always joke when she goes to the toilet that she's going to fill up her piss bottle and when she asks me to hand her her bottle, I say here's your "piss bottle". She's started calling it her piss bottle as well, its become like a mutual thing, like an in-joke between us.

I also sometimes text her when I do a massive crap and she's like "good job my darling" or something to that effect.

It's a thing we have, I can't imagine being married to someone I had to censor myself around. I wouldn't be able to treat her like a friend. I wouldn't be able to be myself around her. I'd have to suppress my own personality and sense of self and sense of humour and it would dampen our relationship. She wouldn't be my real soul mate.

there's a co-worker I know, she's a nice lady but she's single, about the same age as me. Even though she's my friend, whenever i be myself and make some disgusting joke about sex or pissing or shitting, she gets all offended and she reminds me that she's not a guy. She's nice but she's going to be single forever, because no man will want to commit to a woman who censors him and who he will have to constantly watch his mouth around. Imagine sitting at home in your underwear and not being able to fart for knowing your wife might get upset. Whereas me I just rip massive farts while my gf is in the bed with me because we have that sort of trusting loving relationship where we don't have to walk on egg shells around each other and she's not a triggered feminist who hates poo and piss jokes