English teacher:
Other more knoweagable than myself will soon be on to help. In the meantime, here is my take:
After about a month on HT, your sex life will start to go to hell. You will most likely experence hot flashes (more of an irritation than anything). Otherwise your life will continue as usual.
HT (ie Lupron) causes the testes to stop producung testosterone. Meaning that the libido no linger functions. That's why it is called, "Chemical castration".
Try to get your doc to go with intermittant therapy - One year on and than a vacation until PSA rises again. This will give your body a chance to regroup.
You have plenty of time to think about it, so read up on as much info as you can.
Good luck,
Don K.