My experience over the years tells me that it would be very difficult indeed for a straight MB to have a strong emotional attachment (read:love) with someone who is much older, gay and a customer paying you to do something you would avoid if you could.
That's a very big ask.
As I have a very strong preference for masculine guys, most of my offs are straight. (Either that, or they are accomplished actors). I've had some wonderful times with these regular guys of mjne, both in and out of bed. They are kind, friendly, funny, easy-going types who invariably speak enough English to allow conversation to occur. And they never ask for extra money, tips, gifts, etc.
But I'm a realist. I know that they are not able to transition from being friendly towards me to forging any emotional bond with me.
Sex is the most powerful means of expressing love, so my straight guys will always be thinking about the opposite sex when we are in bed having sex.
I'm the last person they are thinking about.
But that doesn't mean I can't thoroughly enjoy the "boyfriend experience".