I've been attempting to reach an orgasm through auto-fellatio without using my hands for most of my life - without success.
Last year I had an idea that it might help to bring myself off into my mouth every time I suck my own dick, from now on.
I don't care for the texture or the taste but I am trying to get more familiar with it.
My own semen sometimes goes right through me, which is mildly unpleasant but mostly it does not.
I don't find the thought of wanking off into my own mouth exciting or erotic but I do get very turned on by the thought of being able to suck myself off - which seems strange to admit and realise now in answering this question.
Immediately after finishing myself though I prefer not to think about it after I've swallowed, and sometimes will rush to the loo to spit it into the bowl.
The taste that is left is sometimes quite salty, and I might have to drink something to take the taste away but there have been a few times when it has tasted quite sweet.
I guess the taste of jizz is down to diet.