Do you have platonic opposite sex friendships?
If you do, does your spouse know about them? Is your spouse friendly with them too? Is there a qualitative difference between your same-sex and opposite sex friends? For example, are there things that you'd discuss with a same sex friend that you wouldn't discuss with an opposite sex friend, or does it depend on the individual?
What if you had an opposite sex friend but you didn't like their spouse, their spouse doesn't like you, your spouse doesn't like them, or any variation thereof. Does this affect the friendship at all? Would you break off a friendship for this reason (spouse not comfortable with the idea or not getting along with them)?

If my husband brings a friend over I'm friendly and polite and helpful to the extent required but I don't really develop a friendship with them. There are some people online with whom I've had PM exchanges that weren't strictly l'toeles, so I guess I violate my own rules on occasion.
they just don't view it as something grave, that's all.