As much as we may not wish to consider our own parents in flagrante delicto, the fact remains that parents have sex — when they can find the time. But sex isn’t just sex. Twenty-something, single-person sex and thirty-something-kids-napping-let’s-go-at-it-in-the-laundry-room are different genres of intimacy. It’s critical that couples in long-term relationships (with kids or not) consider each other and their approach as things get stale or sore or sad or rekindle into a sexual renaissance. That takes real thought and not a small amount of strategy. Here’s some help.