Those unwanted spontaneous erections, just hate them! I suspect that your penis is responding to the movement of the particular vehicle you're in, bouncing up and down, rubbing inside your clothes..stuff like that. I'm not sure that there is much you can do about this except wear something you can easily cover up with as needed. Hopefully this will ease at some point. ALso, if you think about it happening during these times or get worried/concerned about it happening..chances are it'll happen. And by the way, these unwanted erections have nothing to do with sex, just part of being a guy.
Enjoy each and everyone of them! At age 50 I am impotent due to prostate cancer. I have the urge - there is no response. Just once for the good old days I would love to have an uninvited, spontaneous erection.
Im 30 , and when i drive to visit freinds i too get the unwanted erection.Its usually just after an hour into the trip and the feeling gets right up to the "point of no return" , if i was even to touch it at that stage it would happen.Not sure about planes or trains as i havent been on those for years.But yes car (long distance) travel does it to me too.
I'm 28 and I still get erections when I travel..it's a normal thing don't be to concern with it! with or without my g/f it made no difference . I honestly think a penis has a mind of it's on sometimes??....I learn not to be embarress you will soon find out that most women actually enjoy looking at the bulge.
So wear it proudly...lol