Ideas
+33
Gender Reassignment with memory
No gore, but if there's an option to modify a subject's body and you alter it sufficiently (e.g. creating a dickgirl/cuntboi/nullo or altering them completely) they remember the gender they were and react variably (e.g. some are happy with their new body and aroused, some are horrified/upset etc etc)
Customer support service by UserEcho