I'll go for days with my cock hanging out of my pants, hours at a time with it hard and wandering around my house and garden - don't care (but seceretly hoping so) if neighbours see. A long, almost see-through t-shirt can be pulled down when visitor or delivery guy knocks on the door.
I stroke and play with it at regular intervals -- until until I get that amazing sensation going down my legs to the soles of my feet... stop! Do the dishes or something. I don't want to spurt -- the post-climax can be so boring!
After my sex-adventurous wife died, guess being an exhibitionist fills that gap. That's why I be on SYD, enjoying the company of others sharing what society deems should be hidden - and that paradoxically is what, for me, makes it arousing.