DH + LE DIET???

Hiya, we've put our sway attempt back to early next year but i shall be starting back on the diet just after christmas, i've been taking in all of the info on here over the last few months but theres one thing im completely unsure of...What DH has to eat/drink? he is willing to try anything! i shall be on the Le diet,taking baby asprin + drinking diet pepsi, Hubby is a 'normal' pepsi drinker - will it help if he drinks the diet stuff too? he's also a coffee drinker - although caffeine free at the mo and has candarel in it instead of sugar, is this ok? i shall be totally vegetarian on the diet - does dh have to do that too? (he's a big Mc Donalds 'double cheeseburger fan'!)

Sorry for all the questions im just unsure of what he should bve doing. Many thanks in advance for your replies :)

DH does not need to follow LE diet, but it may help if he gives up or cuts back on meat (esp. red meat), eggs, fish, nuts, and healthy fats. He may want to eat more soy foods and drink soy milk.

Coffee is def. allowed with caffeine if he would like, and Diet Pepsi can't hurt and may help but full sugar is allowed too.