On Valentine's Day, women lamented having to fuck their men. Now, having to fuck somebody just because it's written on the calendar is fucking stupid, but if you're not having sex often enough that that 'special day' is the only time you're doing it - a birthday fuck is the least of your troubles. Seriously, nobody has ever cried because nobody fucked them on their birthday; they felt bad because they don't get to fuck any day, either. Last year, I was given a titfuck for my birthday; one of my favorite things, but I had hurt my back earlier that week, and we couldn't find the Astroglide, so it was not the most ideal experience. Next time, obligated sex will be negotiated first. If one person isn't feeling it, postponment is more than allowable. Don't get hung up on the calendar.