Never done it online, as I never really got to have an online sub or slave.

Offline is different. In my case it's an initiation rite, and usually takes a weekend, ideally 3 days and 2 nights (from Friday night to Monday -just before dawn, since many times work is a reminder that there is real life out there and bills need to be paid LOL).

Some of the things we do are purely symbolic, and founded in Celtic mythology. Usually there is no sex involved in the first 24 hours, building up to a desire level that would make the foundation of the relationship worth the while, or at least worth remembering later on, when she is out there, at work or with her family.