I can see where they're coming from. For me it's about losing things and having to accept that.
No testosterone - less strength and stamina. No libedo (perhaps a blessing as your body stops working in that department)
Carefree existence - with advanced prostate cancer you know you're on borrowed time and can no longer think of yourself as invincible
Body image - you're going to put on weight. The trick is not too much to minimise the moobs!
Clothing - now chosen for its ability to wick sweat from hot flushes rather than for any style
Travel - limiting your ambitions due to insurance costs, or fear of getting ill in a developing country. Luckily for me I have always hated airports so it's not a huge problem. However, for each trip you think, is it worth it; am I going to be well enough?
People's image of you - not expecting you to be able to do something, or starting every conversation with a surprised - you look so well!
Masculinity isn't really an issue if you're in a loving relationship. It doesn't matter if sex has gone in this case- you still have each other. You just have to adapt to the new you and try to get on with it. In my case the use of a lot of dark humour has helped me deal with others.