I was told that in a normal, healthy male, there is not need to wait two days inbetween sessions, as although there is a decline in numbers, it's minimal. When we were TTC DS, we DTD twice a day around O time for 3 or 4 days in a row. My poor DH was exhausted. I almost had to force myself on him.

Celsie. xoxox

p.s. Just had a funny flash back. On our first month of TTC, we DTD 15 days in a row... some days was twice a day too. Now that's dedication! LOL