Jerking off thinking about your straight friend

I was living with 3 straight guys at my last year of college. One of them was a hot guy who liked to work out and run. One day we were talking about why male athletes slap each other’s butts. It became a thing then between the two of us. It was more spontaneous and funny, but of course I found it hot. When it was time to move out, we all said our goodbyes. For him though, when it was just us left, I said I need a slap on the butt before we go. He does it, and I say I’ll miss it, and that I’ll continue thinking about him while jacking off. He laughs and says he’s glad he was able to fuel my imagination. I said, well, seeing you naked and the butt slaps helped. We kept in touch, and I went to his wedding a few years later. He’s a cool guy.
 
I was living with 3 straight guys at my last year of college. One of them was a hot guy who liked to work out and run. One day we were talking about why male athletes slap each other’s butts. It became a thing then between the two of us. It was more spontaneous and funny, but of course I found it hot. When it was time to move out, we all said our goodbyes. For him though, when it was just us left, I said I need a slap on the butt before we go. He does it, and I say I’ll miss it, and that I’ll continue thinking about him while jacking off. He laughs and says he’s glad he was able to fuel my imagination. I said, well, seeing you naked and the butt slaps helped. We kept in touch, and I went to his wedding a few years later. He’s a cool guy.
That’s fucking hot! I’ve talked to my married straight friend a few times and he’s told me about how he just jerked off that morning.
 
I don’t tell them about it, but I think about them all the time when I jerk off. I have one straight friend who is currently separated from his wife. I sometimes fantasize about hanging out with him just the two of us, and we have a few drinks and start feeling good, and I offer to blow him as he hasn’t gotten any in a while since the separation, so he must be pretty horny. And so he just lets me go to town on him. That’s been a common one for me lately lol.
 
I didn't tell him but I'm sure he knew and probably liked it. He knew I was gay and a little bit into him. He used to tell me stories about how he liked to sunbathe nude in his backyard and show me pictures of him in his wetsuit from his diving during the weekend. Nothing ever happened and we've moved thousands of miles from each other but if the opportunity ever presented itself, I wouldn't hesitate.
 
Quite a number of people disregard the relevant addition: “with their knowledge”. I’m sure every gay guy wanks off to their friends if they’re attractive, gay or straight, but the key here is telling them.

To answer, yes, they definitely know but in my social circle we have a somewhat different attitude towards wanking than most, in that it is not regarded as something that is done in secret, nor shameful. So if there is something about them that turns me on, I’ll definitely communicate it quite clearly. And it’s not a daily occurrence but I have seen them wank themselves off, which is of course an excellent visual aid 😆 for our own pleasure.
 
I haven‘t told any of them, but I have masturbated thinking about some of my straight friends of course.