"I've never told anyone this story." What story?" I almost got mugged by a guy with a knife in a laundromat when I, we, were undergrads at Cal Tech. T...ere was a girl, woman, who bashed his head into a sink and then used his own knife to cut his throat." Oh, Christ." Yeah. She didn't leave any evidence behind - no DNA, no fingerprints, not a hair or a fiber. The thing is that she had written the breakthrough equations on a table with a marking pen. I talked the crime lab out of the tabletop. Sitting there relaxing and sort of daydreaming of today I glance at the walls on both sides of me, I then began to read all the nasty things put there by some very horny people. (I assume men or boys who went in there thinking that what they would write would get girls turned on and horny.) Some of the stuff was cute while other things are downright filthy and sick. Looking to my left and right I saw that the walls between the stalls had several man-made holes, just about level with my arms.. I didn’t know what to expect when Mom returned to me.Mom said, “So you want to play with my tiny tits for an hour or two in the bathtub, do you?”It sounded like an invitation to me so I replied, “Yes I would. I’ve always loved your tits Mom.”She smiled and said, “I know dear and you may be the only one. I never liked them. I always wanted bigger ones and obviously your father wanted bigger ones too.”She took my hand and asked, “Shell we go up to the bathroom or skip the water and just go into. We discovered that our father had kept track of out fertility from the moment he discovered that we played around.He knew it was my safe time, so he concentrated on Glen, who fended him off until my period finished.Now that daddy couldn't gain the obvious clue, Glen and I not only had to switch sleeping locations, but we had to share little intimacies that only one of us should've heard, and then in order to pretend to be the 'ignorant' twin vis-a-vis any specific tidbits of information, we had.