I'm in a state of arousal a large part of the time. I like exposing my erection when/where I can get away with it. Twitching, moving around by itself, I get very horny when driving the car, and will pull into parking lots, get my pants/underwear down and satisfy my needs right there. I have a worn out dark t-shirt handy to shoot it onto and wipe it so there's no mess. You can read my profile about how I'd take my erection out under the table in certain classes sitting in the back, roll down my reservoir tipped condom (pushing back my pubic and shaft hair first so it wouldn't get pulled) to the base, then go all the way with my right hand. One time my male teacher caught me as I was cumming, filling it right in front of him. I was afraid he'd call or write my parents, but didn't. Probably in part because I didn't make a sticky mess. He did watch as I took it off, tying it at the top, then wiping my penis still almost at full size, especially the head.
Thanks, having you watching would increase my pleasure, getting me even more aroused. The man in this video wisely had a light jacket for reasonable discretion, but it's impossible to completely to fully hide it. That light jacket would come in handy to catch my load preventing a sticky mess, and wipe my dick before putting it back in my pants and zipping up. Keeping any residue out of my pubic and thigh hair.