Continence. Mostly this term is used in connection with abstention from physical relations. I, for example, as well as being an aachaarya (spiritual teacher), am brahmacharini, single marital status and celibate. It is a choice, not an unavoidable condition!
What use is this knowledge to the general public, to the readers here? Well, the purpose of my A - Z offerings is to provide prompts for self-improvement. Brahmacharya, whilst it can be taken for the purely physical aspect of sexual restraint, is also to be taken at the philosophical level. Self-discipline. This means that we must consider all the potential for distraction and impurity in our lives. A clear and conspicuous example might be language. If our words are unclean, then our minds certainly are. Brahmacharya cannot be applied if our minds are not resolved to continence also.

The goal of any self-improvement is to have full health and well-being and to be able to sit well in society. We can do all the running, weight-lifting, dietary control and so on, but ultimately, if we are taking in only junk food and mind-altering drinks and substances, at best all we are doing is keeping status quo. What determines whether all that effort will hold and whether we are generally decent folk, is the state of our mind. If we cannot be continent in our thinking, nothing we physically do will fix us. Virtually everything which will take us to good physical health, and bring us to the best we can be, begins at thought-level.
Advaita Vedanta, the philosophy of Singularity is all about learning how to overcome our inner hurdles, deal with the monkey mind and improve our intellectual power. This is achieved best through the application of brahmacharya.
This is not novel. It is not restricted to we who chose to walk a spiritual path. Here's the thing… self-control and discipline are essential aspects of any walk of life where one wishes to attain high goals. One may be married, but can still apply this principle. Do not be wanton. Understand purpose. The desire for a better you, deeply felt, will spark the process of brahmacharya.