In true time honoured MN fashion I'm using A and B and not saying which one I am as I don't want to influence it...
Person A has recently added skipping to their already extensive fitness regime. Person B is being slowly driven mad by the sound of A skipping - a really fucking annoying rhythmic thud thud thud on the floor for an hour, with breaks and then different thudding rhythms for different jumping styles. Thudding can be heard anywhere in the house (luckily not in neighbouring houses) and music etc doesn't cover it as it's a fucking vibrating thing that is like the fucking canon gun in Mary Poppins. Sometimes there is the sound of swearing if the rope is being a fucking wanker and tangling. Skipping cannot be done outside. Person A loves skipping and believes B is unreasonable for the following reasons
B has a sewing machine which makes a pleasant soothing low hum. This hum can stop and start as material is moved around and threads changed etc in the productive useful hobby of making useful things. The machine is thoughtfully situated on a cloth on the table which reduces vibration. A vibrating noise can very occasionally be heard when the cat runs under the table and the foot pedal is accidentally pushed all the way down in surprise. This may be followed by quiet swearing but at a lower volume than B and more inventively eg you fuckknuckle which provides pleasant entertainment for others.
B also feels that their labour is more productive as they make attractive garments and face masks (for the benefit of society) whereas the outcome of A's labour is mostly looking in the mirror and asking B if they can see the change in the shape of their such and such muscle. This also takes B's time away from sewing or thinking about sewing. Also one time B caught A measuring their legs with B's tape measure as they believed one calf was bigger than the other.
Which one do people think is being unreasonable here? I hope I've made it clear that I have been completely neutral.
Just in case, if people say B is unreasonable and A is right, I'm only asking for a friend who doesn't have a MN account