All too often, we think of "sex" as being penis in vagina or anus, but frankly, that's such a limiting view of what sex is. Enter mutual masturbation, i.e. masturbating alongside your partner. Not only is is great for when you're too tired to get it on, but you also get to learn how your partner touches themselves. That way, the next time you do have partnered sex, you can touch them exactly how they like!