13 years? You can still recapture the early days.
Although you may have think you've done it all, there are always new things to try to spice it up and recapture the lust from the early days.
The masturbation technique seems to be one that often works. When my ex would say he was tired, he'd feel/hear me masturbating and that would get him right in the mood and he'd take over. My semi-current guy will wake up to watch. Once he watches me finish, then he'll get involved.
