Easily overlooked, a glasses-wearing plain girl has a tight mouth and doesn't resist men, so she'll accept anything. If she also has big breasts, then you're incredibly lucky. You can raise her into your personal live-in sex doll with unrestricted access, enjoying a convenient sex life with this useful big-breasted girl. Since they have no experience being pampered by men, they can't refuse even forced sex. They'll accept irresponsible barebacking and won't make a fuss even if they get pregnant because their mouths are tight. Enjoy the 300 minutes of impregnation sex these plain but highly sensitive girls receive to the fullest.
