this has happened to me once in the past,
when i started to wake up i realised my head was on his stomache an i was rubbin his hardon.
soon i woke up but i realised he was moaning in his sleep.
so i carried on till he woke up lol to see wot he did. all he did was moan, an then he woke up an he said he didnt feel a thing or hear himself or me moanin.

wonder wot he was dreamin about haha.