We forget. Our mom's have been there!
Several months ago my mother was doing the laundry. She came on a skirt of mine that was a light pink in color and saw a some stains on it. She apparently studied the stains over quite a bit and must have had a good idea what it was. She brought it up to my room and asked me what it was. I told her that I'd spilled some milk on it but I could tell she wasn't buying this. I knew exactly what it was and remember getting the stains on me and didn't think anything about it. We forget that moms were once girls too and that they had also been with boys. Needless to say, she knew a lot more about this sort of thing than I do especially being that she had been married to my dad for years and I was well aware of what goes on between husbands and wives. I finally confessed to her that it was as she thought. Semen.
Mom went on wanting to know how I got semen on my skirt actually wanting to know some of the details. I was now real red faced telling her how I had had my dress pulled up while giving my boyfriend Johnny a hand job and how he had purposely shot his cum on me thinking it was cool. She then wanted to know what else we had done together fearing that I would tell her that we'd had intercourse. I assured her that we hadn't and had only 'played with each other' and that was why my dress was up. All my mom said was 'you be careful. This stuff is dangerous' while holding my dress in my face. I told her 'yes mom, I know'.