Hey OP -- thanks for your advice -- I did what you said, but strangely, I do not SEE it anywhere -- oh well, I will re-post the same words here, as a reply.......
OK, here is my story....... or rather, the beginning of many.
I love reading the postings here about people cumming into the food and/or drinks of relatives. Family "members".
For me, though, I find it most erotic to cum into the beverages of women I have never seen before.
I do it at coffee-places, ALL THE TIME!
I keep a storehouse of jizz in my freezer. But I crack off a bit of it now and then and put it in a vial, and put this in my backpack when I go to a certain coffee place. It is perfect for my particular intentions because it also is a part of a bookstore. I sit there and wait for a gorgeous [she must be gorgeous, or I am not interested] woman to come in and sit down at her own table with a coffee or tea. University students are the best because they will be there for a long while.
So -- instead of speaking in generalities, I will focus on a specific instance.
This beautiful girl comes in, long legs, she's wearing shorts, she sits down and immediately I am waiting for my moment. She has her coffee there in a paper cup with the lid on it. I go to the condiment counter and get a new lid.... a plastic lid. I take my now-melted cum vial out of my backpack and pour a bunch of my jizz onto my own coffee-cup lid and then set it next to me, with a napkin over top of it. At some point, I know that this girl is going to go to the washroom and leave her coffee unattended. The seat that I am at is right next to the washrooms [I can even hear the toilets flushing] and I strategically even sit at a place just beyond the store cameras, to minimize getting caught if something goes wrong. This girl in the particular instance I am talking about gets up to go to the washroom and when the door closes I immediately get up from my seat, walk over and replace my jizz-filled coffee lid with hers. And so, as she is in there I know that my cum is seeping right into her drink. She came out and sat down -- fiddled with her paperwork for a bit and then picked up her drink.
I cannot describe for you in human words what it feels like for me to sit a few tables distant and literally see a gorgeous woman whom I have never seen before in my life -- drink my cum. And I know she is doing it. A few times I have snapped photos of this.
One other instance I shall mention -- this may not appeal to everyone out there -- but here goes.
One time I was afforded the same opportune moment, a beautiful girl, early 20's -- I mean, she could be a MODEL -- sits down. She had a large tea -- I knew this because the tag thing was hanging off the side of it. A stir-stick was IN the tea.
But I did not have my vial of cum at the moment. [I was unprepared]. So I had to think of a quick alternative.
I went to the condiment counter and grabbed a wooden stir stick...... went into the nearby washroom, and I lubed that stir-stick up with my own spit and shoved it as far up my ass as it would go. I even turned around and looked at myself in the mirror and I could only see a wee portion of the thing visible on the exterior of my ass. I then twisted it around in there to make sure it got a bit soiled. When I pulled it out, there was some actual shit on it.
I went back to my seat to wait for her to leave hers.... I had my shit-smeared stir-stick hidden under a napkin.
A little while later she got up from her seat and went to look at a few books in the Bargain section of the store, I could literally SEE her legs from the middle portion of the racks, so I could tell that there is no way she could see what I was about to do. I went over to her tea and quickly exchanged my stir stick for hers.
When she came back to her seat and sat down, I cannot even describe the magnitude of my boner as I observed this gorgeous girl happily drinking her tea when I knew that there were pieces of my shit floating around in it. The only thing better would have been if she took it out and licked it, which she [sadly] did not.
May not appeal to everyone -- but hey, I'm not everyone. It very greatly appealed to me.