Well, that's always everything individually. If you want it, and your girl expressed consent or shows the initiative, then there is no need to wait for an expiration of a term? I advise from simple but interesting options, try to discover BDSM culture. This is not terrible if you start using simple toys, such as the flogger in the article , it is described in detail that it is a toy and how to use it. Ideal for beginners who want new feelings.