Have you ever heard of 'sleep sexes'? Not much, right? This is a quite uncommon thing one experiences. Basically, sleep sexes refer to the process of making love when the partner is still not in senses and is asleep meanwhile. It happens with some of the people when their partners do not like random kissing and may carry some sort of fear while kissing but they deny to act the same while having sex.
There is an explanation to this. Read ahead to know the complete reason.