waimengwan wrote: desiring relationships and wanting to be in one does create further samsara for us.
I think, perhaps, "creates further samsara for us" is not quite accurate. The point is well made, but we create samsara for ourselves, and this samsara, this experience of rebirth, is essentially a manifestation of our own attachment.
We can list all of the things that the Buddha advised his followers to abandon according to the vinaya, the monastic tradition. But we can also think of things that he never mentioned. For example, I don't think he said specifically not to climb trees or not to ride horses or whatever. He could have prohibited these activities and many others, but he did not. Why not? Couldn't an individual just as easily become attached to climbing trees or riding horses? Perhaps.
But I think the primary reason for his various prohibitions had to do with how distracting they were, and how much they might keep a person from practicing dharma, and specifically, from watching one's own mind and motivations. When you live as a householder, there are all sorts of worries and responsibilities that you take on. Where will your family live? How will your family be supported? Will your children be safe? What will happen if your spouse dies or becomes seriously ill? These are all important concerns, and as a layperson one can certainly approach these various types of problems mindfully and with compassion, but they are still distractions when compared with a situation where such problems do not arise.
Consider a modern example, say, a medical student, who has committed himself or herself to several years of intense study and practice in order to someday become a doctor. They might forgo all sorts of things that other college students indulge in, and they might postpone getting married until after they graduate, because they are really focused on getting a medical degree and hopefully to be tops in the class. So, it is for very practical reasons that the Buddha advised ways not to become distracted.
But some things, for example, sexual activity, carry a lot of, you might say, "attachment energy" with them. Much more than climbing trees or riding horses. So, the buddha looked at specific things in a very practical way and told his monks, "avoid doing this". But it doesn't mean that every person who isn't a monk or nun will automatically
create more conditions for samsara. Sometimes monks and nuns do this too. It really depends on the level of attachment, and how much one clings to the satisfaction or dissatisfaction resulting from events.