When I was 25 my dad had a serious accident and was paralised pretty much from the neck down, at first he accepted it and was pretty upbeat about it but after a few months he became depressed. I asked him why he had changed so much and he told me he kept getting a hard on and could not pleasure himself any more, I told him it was OK I would do it for him and freed his cock and started rubbing it off, it was the first time I ever stroked another mans cock and was surprised that I got hard doing it. It did not take dad long to cum and after I cleaned him up.
The next day as I was dressing him I jacked him again and again I got hard, this went on for some weeks then one day while I was jacking him I just leaned in and took him in my mouth, almost immediately he emptied his balls down my throat. He said that it was the best cock suck ever and asked if I wanted him to suck my cock too.
We sucked each other off every day till he died last year