My girl gets bugged by her friends for the exact question you're posing...I swear she gets stronger and leaner the more we f@#K....I don't really believe it...but it does seem to happen
my old lady was blowing me about 2 hours after every injection , she created one hell of an attitude ! said she had headaches and felt great pumps in the gym , so then i figured out the routine and said i uped the injections to everday . .......i really don't think it's possible to translate it in your sperm though .
A few years ago I had a workout partner who's blood to androgen ratio looked like 1:25. Anyway, I used kid around and tell him that the reason I always grew while training with him was because the sweat he left behind on equipment was loaded with 10-12 different pharmacological agents. It was like a contact high only with reference to juice!
Seriously, I highly doubt you ejaculating inside your girlfriend is going to increase any of her hormone levels. Think of the ramifications if jizz contained high androgen levels.
Cock sucking whores would be no one you would wanna mess with!