<human>: My stay-at-home wife and I clearly have different appetites for sex. In my fantasy world, we'd have sex 3-4 times a month (which I think is reasonable but I'm open to your feedback). In the good-old-days, we averaged about once per month. In 2014, we had sex 5 times. I am confident that infidelity is not an issue.

We have two kids, youngest is age 2. Raising young children is tiring and at the end of the day, my wife understandably would much rather sleep, so nighttime romance doesn't work. Morning sessions are also out because my wife likes her sleep. 

The sex itself has been pretty routine pre- and post-kids. I've suggested different positions and locations and to her credit, she has been receptive (no pun intended) but finds missionary the only comfortable position for her. We use lube when necessary, have plenty of foreplay, and I am -- ahem -- average sized so that's probably not an issue either.

In the past, we I've expressed to her my desire for more frequent sex, her solution was to schedule it (Friday and Saturday nights), which I find somewhat undesirable because it lacks spontaneity. However, I've given it a try over the past 3 years and, well, you know how successful it was in 2014. 2013 was worse but that's because we had a newborn. 2012 wasn't much better.

I feel pretty despondent about our marriage when it comes to sex. I can't find another partner (we both firmly believe in monogamy) and I feel like I can't bring myself to ask for sex because it feels like begging. I've even considered trying a year of abstinence for 2015 but I don't think it'll make anything better.

Reddit, please help!

Can you provide a brief overview of the text?
<bot>: Last year, we had sex 5 times. That's not enough for me and it's driving me nuts. What can I do?