Which sexual "immorality" is worse?

-Consentual sex between parent and off-spring (any age)? 
-Consentual sex between siblings? 
-Consentual sex between cousins?
-Consentual sex between pre-adult/teen and pre-adult/teen? 
-Consentual sex between pre-teen and pre-teen? 
-Consentual sex between pre-adult/teen and pre-teen?
-Consentual sex between an adult (other than parent/grandparent/etc.) and pre-adult/teen? (Assume the pre-adult/teen understands sex and does consent--legality is not the issue here)
-Consentual sex between an adult (other than parent/grandparent/etc.) and a pre-teen? (Assume the pre-teen understands sex and does consent--legality is not the issue here)
-Consentual sex between an adult and an adult who are un-wed?

Again, legal ramifications are not at issue, only your own personal "morality" towards these specific pairings.

>>12 you are stupid, how can you judge the feelings of someone that is to young to even understand them fully.  i mean if i feel its alright to torture and murder someone it should be all right if it makes me feel good. no thought put into what the other person thinks. 
 
>>10  Also to be the devils advocate as well i will attack you.  those studies are taken under the wrong context if you think about it logically.  perhaps the trama wasn't actually the sexual experience itself but meerly how society viewed it.  if the same study were to be done in ancient rome when it was considered socially acceptable to have sex with those people would the trama be the same??  it is obvously impossible to know this but put some more thought into the social  context of studies like this.