[quote=dongalong]If you have ever ejaculated under water, you will know that semen becomes stringy and glue like. It doesn't seem to desolve completely on contact with water. So when it dries it seems to be slightly waterproof. I have had baths that last over 30mins and I could still smell it afterwards.
Hi, ...I guess you are talking about ejaculating into hot water. Spunk is made of stuff not unlike egg white. When you put it into hot water it cooks and its character changes to that giveaway glue like substance that tells later bathroom users what you've been up to.
Uncooked spunk washes away with water or, if you prefer, some slightly salted water, no probs. Your knob is not going to be hot enough to cook spunk but it is warm enough to breed spunk eating bacteria. Enough to cause a bit of a whiff after a few hours...like feet.
Another possibility might be Crystal Spring natural body deodorant which amazes me that it effectively deodorises absolutely anything I've tried it on including my cock and works for hours and hours, It's hypoallergenic and not tested on animals and its made from salt from Thailand.
www.crystalspring.co.uk
Just a thought.