Unfortunaltely my "lets have sex" button is actually a macro that goes something like . . .

Get Breakfast
0.1s
Wash Up
0.1s
Walk The Dogs (Morning)
0.1s
General Tidying
0.1s
Do The Washing
0.1s
More Tidying
0.1s
Get Lunch
0.1s
Wash Up
0.1s
Do The Ironing
0.1s
Walk The Dogs (Afternoons)
0.1s
Get Dinner
0.1s
Wash Up
0.1s
Lets Have Sex

Generally works, though it does somewhat depend on whether the "In The Mood", "I Have A Headache" and "Too Tired" Flags are set or not. Note as well that the length of the macro appears to be directly proportional to length of time married.