That happens alot to me after my bf does oral and sometimes even when he using his fingers. I think its just an irrtation, because it goes away after like 20 mins after he is finished.
do you use anything like lubs or things like that? that could be it. if not it could just be the hair irritating you. sometimes it happens to me and the dr. said it was probably the hair irritating you from being rubbed against your skin. but it could be something totally different.