bit of advice for a sexomniac (sleep sexer) please?

Hi, I've got a condition called sexomniac. For those that don't know, it's sort of like sleep walking but you take part in sexual activity, sometimes quite aggressively.

Now, a few weeks ago, I woke during an episode and my husband was in the process of guiding my hand to his bottom. This is not something we have talked about, so I was a tad surprised and pretended not to notice.

My question, for those who take part in this sort of activity, how did you approach the subject? I've been in a previous relationship where he enjoyed it but he asked me about it so have no idea what to say/do. Thank you in advance.