My ex (last man I ever dated, as previously mentioned) had a drink problem, which became the instigator in me leaving albeit I tried to help him with it for a LONG time before AND after we split up. I hadn't noticed it, I think because I was young and we would go out drinking a fair bit, or for dinner and drinks like was fairly normal back then. I didn't realise he was doing it all the time, when we didn't see one another, after we'd got in once I was asleep, and eventually all day and lost his job due to it. Aaaanyway........
One day I came home from work and he was as was fairly usual, asleep on the sofa in a stupour. He had undone his jeans and his manhood was sticking out. Again, unfortunately normal.
But I looked, because his (sizeable) knob looked like a tomato sausage. It was bright red like the colour of chilli sauce. I couldn't figure it out. Later on when I woke up he explained that his jeans had felt too tight and he'd undone them for that reason. Odd but fair.
A few days later he was doing the previously mentioned thing of 'bobbing along' naked apart from his dressing gown sans belt, and the contrast of his white beer belly/legs against his knob was stark. It was still bright red.
I had to ask him again.. 'Ex, why is your knob the colour of a ripe tomato?!' and he admitted that he'd ran out of lubricant so had decided to 'jerk off' with antibacterial soap as it was the nearest liquid to him at the time.
Would've been good if he'd have used it on the rest of him or in fact, ANY soap at all, more regularly.
It took a good few days for the redness to go.