Today I decided to post about Preseed. 
 http://www.amazon.com/gp/product/B004RBL5ZM/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B004RBL5ZM&linkCode=as2&tag=ttin04-20
Personally, DH and I have never used it, but hearing from friends and reviews on BabyCenter.com and Amazon.com, I figured I would let you guys in on a seemingly awesome product. Preseed is a lubricant specifically for TTC couples. Most lubricants are not conducive to your DH's little swimmers makin' it to your egg. Too thick. Preseed works much like EWCM (eggwhite cervical mucus) which is the most fertile type of mucus, and the type of CM your body produces when you ovulate.  I don't use a lubricant, but if I was going to, I would definitely give this a try. Good luck, my lovely ladies(:
Amy