That’s actually a very personal boundary and really depends on how a couple defines ‘sharing.’ For some, starting early might indeed feel like borderline cheating, while for others, it’s just part of the agreement. Same goes for sending pictures—some might see it as a way to build excitement, while others could feel it leans into a cuck dynamic.
It’s an interesting discussion because it highlights how different people interpret this kind of arrangement. Like you said, it all comes down to context and the rules that are set beforehand. As long as both partners are comfortable and on the same page, that’s what really matters. And regarding your example—yeah, sometimes you don’t really know how you’d feel about something until you’re actually in that situation haha.
Also, in a way, ‘sharing’ seems quite similar to an open relationship, just with more defined rules. And that’s where the tricky part about cheating comes in. If the agreement is for certain things (like only threesomes), but then one partner starts doing things solo, it could be seen as crossing the line. On the other hand, if both partners agreed to something in advance, then technically it’s not cheating, even if it might look like it from the outside.
It’s almost like a contract—if both sides stick to the agreed terms, it’s fine. But if one person starts feeling like the other is going too far, then there’s a problem, even if no official rule was broken.