All depends on how the guy feel. Most man will want exclusive but exclusive will have to come with a price tag and may not necessary be good.
If men are not willing to pay the bill then you will need to look for something that is part time basis. Part time basis means you need to share.
If this is to happen, normally the SB will not tell you, but of course if you ask me I would prefer to know and accept provided the other party is decent enough.
Well this is what I think and different people has their own preference.
