Number 1 I’m totally fine with. But I can’t poop with onlookers. Besides, I’ve always been a fan of reserving some semblance of privacy even in the closest of relationships. I just find that it’s a lot easier to maintain romance/passion when you haven’t seen your partner’s poo-face.
I don’t have a partner, but past people I have dated, generally didn’t care about open peeing. And in general, I’ve found males usually not to be too shy about it, especially outdoors and/or after drinking. And my housemates, while we won’t pee in direct sight of each other, have no issues with peeing while someone is hidden behind the shower curtain.
OTOH I’ve never been comfortable being around #2 going on or had someone comfortable around me doing #2. In fact I don’t even like people to be in the adjacent room for that. I’ll usually turn on the sink to achieve a semblance of auditory privacy.
Never been a problem for either of us - we don’t ever bother to close doors in the house unless guests are over (his studio being an exception, to keep the cats from clawing up the harp case). Rarely one of us will feel the need to give fair warning to the other (“quick, turn on the fan and leave the house”), but that is just courtesy, not delicacy.
In both of my marriages, the woman in question was opposed to both, though my ex would occasional pee while I was in the shower.
My first serious girlfriend was fascinated by the idea, and would demand to watch me pee. I think she has a fetish. hehe
I would pee in front of just about anyone, but I would be uncomfortable with a BM in front of the little lady.
Especially my current “wife” who is just to damn competitive…
Pee: yes
Poo: are you fucking insane???
I’m scared.
I won’t even pee in front of my dogs. 
They follow me around and they’re probably wondering what I’m doing in the only room in the apartment where I tell them to go out.