Me and my partner have just started TTC since a week ago after considering it for a long time. This is the first time either of us has had completely unprotected sex without contraception. I've been on the pill constantly since I was 15 and I'm 29 now. The sex while TTC has been absolutely mind-blowing. It was fine before but I honestly feel like it's gone up a notch - maybe more like 10 notches 
. I'm finding it to be a massive turn on to be doing what our bodies are supposed to do and just letting nature take its course. DP feels exactly the same way about it and is loving it. I'm just trying to enjoy it while it lasts as I'm sure that if/when I do get pregnant, the frequency of sex will decrease dramatically, and it'll probably be non-existent for a while after I (hopefully) give birth.