Tomatoes grow bast in a slightly acidic soil with a pH of 6.2-6.8. Urine can vary wildly in pH depending on recent diet, ranging from 4.4-8.0. However, the nitrogen in urine is in the form of urea and is not directly available to plants until it has been processed by several types soil bacteria which in turn convert the urea first to ammonia, then to nitrites and then finally to nitrates. However, the nitrogen levels added to the soil must be monitored so they are not too rich, Additionally, the salt content of urine may lead to excessive sodium or potassium levels in the soil. Tomatoes do best with fertilizers that keep nitrogen-phosphorus-potassium levels in a ratio of 5-10-10 to 10-10-10. Too much nitrogen will lead to tall leafy plants but with little to no fruit, so it's best to lay of urinating on your tomatoes unless you perhaps add some phospate containing dish water or wash water to the regimen. to make sure that you don't over-supplement the nitrogen and potassium and neglect the phosphorus levels.
I have only done COF once and it was extremely HOT. I was with my ex who liked to watch porn while we had sex. The first time we both saw COF she was a bit turned off by it. She said she would rather swallow it. For me being a visual creature that I am I wanted to at least try it once. Over a couple of months during sex we would be talking dirty and I would ask her, If I could cum on her face she would agree. I could never pull the trigger and do it as I really enjoyed her swallowing my cum. That scene played out quite a lot over a couple of months of asking but just not doing it because of her original No running through the back of my head.
Finally one night after a really hot fuck session again during the dirty talk I asked if I could COF and she said yes. this time as I got close I again decided I would just rather cum in her mouth, She had other ideas. she pulled my cock out of her mouth as I was about to cum and I shot my load all over her face her hair everywhere. She went back to sucking what was left and sucked me dry. It was very HOT to say the least. She became even more hot as I was about to go get her a towel she just used her fingers and scooped up the cum off her face and into her mouth. Saying how much she loved the taste of my cum.
After I got her a towel and cleaned up what was left we layed there cuddling she asked how was that. I said it was fucking HOT. She goes I saw the look on your face of such joy. I was glad I was able to do that for you looked surprised and you seemed to cum harder, which I did.
It has been only time I have done it. It does help that two people want to do it.