Size matters when TTC

So I see people posting their calendars and they're able to BD every day for a week straight during that fertile window. Well, sadly (not sadly) DH is too, ahem, well-endowed for us to comfortably BD daily. We are all about quality versus quantity and this hasn't, and physically cannot, change while TTC. I wonder if this effects our fertility. However, we have a daughter, so I guess timing is everything?