I took an extra long lunchhour once at a park that was adjacent to a local high school, not too far from my office. I had decided to sunbathe to start some semblence of a tan before I went off to my high school reunion the following month. I brought two big beach towels with me and placed one on the grass, in a spot partially obscured by bushes, but still within sight of the track. I discretely removed my pants, shirt, shoes and sox, then laid down wearing only my underpants, placing the 2nd towel over me crossways.
As I watched the young girls jog by, I found I was getting an erection fantasizing about having one of them stroll over, kneel down between my legs and jack me off. I would always pick out the cute blondes. On an impulse, I started masturbating discretely under the towel with my dick pulled thru the fly of my briefs, stopping only when someone was close or happened to glance my way. I fantasized that a certain high school girl that I'd spotted was giving me a handjob right there in the park.
After about 10 minutes of slow subtle stroking under my beach towel, with my knees slightly raised, I ejaculated - putting a rather large, gooey load of fresh cum right into the towel. God it felt great!! And it was particularly exciting because of where I was, right out in the park and everything. Then I reclined back and resumed my sunbathing after my penis went flaccid. I even managed to doze off for awhile - with a big smile on my face.
What better way to spend a lunch hour?