You can live without sex, for that there is self-satisfaction, but from time to time you need someone of flesh and blood to make you vivbrate.
Time is not importan, quality matters, you can be with you partner as many minutes as you want, it all depends on you, your tastes, and the tastes of your partner. If they have foreplay, if they use different roles, and pamper them at the end. As gratutude for the moment shared together.