Well, it is and it isn't. For me, you have to remember that the giant O-cup tits are mostly stuffing, which isn't squishy and soft like real boobies.
What's awesome is the feeling of sexual power. Cris is just blown away when we face each other chest to chest. It's like I'm not just his Eliza anymore, I become this very sexually powerful creature. It's really hot to see his reactions.
For passionate kissing, he has to approach me from the side when I'm wearing the O-cup bra.