I also know he drinks energy drinks everyday. I don't remember what its called but he was telling me that they have a lot of ginseng, B vitamins, and a bunch of other stuff in it I cant remeber in it.
Is it Monster? I love the green variety, it's my version of coffee, and yes, the B vitamins, ginseng, and guarana together have the tendency to stimulate the libido. My lady has been "tapping out" lately too, even making up a 'safety word' to snap me out of it, I guess. She's asked me to take it easy on the supplements and energy drinks, but I dunno...

the fact that you are trying to conceive has a TREMENDOUS psychological impact and makes sex all that much more intense and meaningful for him. Thats the sealer on the deal.
I'm inclined to agree. A close friend of mine down south suffered from not only low self-esteem on account of his out of shape bod, but also some semi-serious stomach issues. Once he and his neurotic ass wife decided to have kids, her being constantly seed-hungry made him feel like a sexual dynamo. Can't say I've ever seen him happier, and according to him his stomach issues more or less went into remission.

But now they have two kids, little sleep, and even less sex. Poor guy

If theyre trying to conceive I doubt he is taking roids lol.. that would stop sperm production
A good way to tell: if after climaxing he punches her in the face and storms out of the room, then you can suspect 'roids.