Ttc...but naturally

I've been ttc for about 6 months but not really following any opk test or charts or anything, just trying to let it happen on its own. My cycle is anywhere from 28 days to 33 days but my periods always only last 5 days no matter how long my cycle. I'm sure it would be a big help if we followed charts and did the opk tests but I am worried it will take the intimacy out of it and make it more of a job. Does anyone have any advice on how to still keep it intimate while ttc using these methods?