The most common reason I skip a workout is usually because when I get home from work and take my pre work out it makes me have to take a dump, then while I'm on the pot I start fucking around on my phone and usually end up on here or twitter and run across some sorta porn. Well y'all know me, then of course I have to crack on off and by that point the wife is home and I eat dinner.
BTW jerking your deal when you've got a nice Jack3d itch going is the best.