But wait, if spacemarines have all kinds of implants and extra organs (the second heart, an extra lung and presumably an extra penis or two to go with their krogan-like 4 testicles) does that mean that sisters of battle also have extra shit? Like a spare uterus or a third boob? My mind is already venturing too deep into tentacle porn hentai territory

This discussion was already gone to some dark places, did you really need to be so disgusting and take it too far?

FYI, even if your post wasn't worthy of being disregarded by virtue of it's pure awfulness, it should be disregarded because it's canonically wrong.
Sisters of Battle are normal humans, elite operatives trained to the peak of human capabilities from birth, but normal humans nonetheless.
They do not have the space marine implants because the primarch geneseeds are only compatible with male cells.
They do have some psyker powers though, courtesy of their fanatical faith in the emperor, but biologically they are normal humans... so no extra breasts or genitalia you awfull, awfull man you

Hey, leave him alone... a man can dream!

Ok, you have taken this to far, boys! Keep the topic light and fun an not genitalia focused!

Now I know things about Space Marine anatomy I never wanted to know...

Apologies ladies, my filthy mind got the better of me

I'll try my best not to let it happen again... but I can't make any promises
Just kidding ...
...no I'm not...
...yes I am...
....

I'm reading this and I can't help but think : I want a Space Marine for Christmas

HA!!!
See! I'm not the only kinky one
There are other people with dirty minds here also

I was always wondering about dark Eldars They seem so sexy to me I know, I know... I'm a filthy Xeno heretic

Settle down ladies.
This is a topic about mashups of fantasy characters, not a topic about your personal fantasies featuring characters you would want to mash... ummm... body parts with
I can't believe I'm the one taking the moral high ground here