He is insecure about himself that's why he feels shy. He should start working on it, you should guide him to have a high self-esteem.
About the question, just explain him he should not compare to other people, if she chooses him to do "the thing" he should rest assured she is attracted to him the way he looks.
Yeah I'm not saying feeling good about helping other is bad. But isn't like real altruism exist anyway. IMHO
Even people who do things wo getting something in return do it for the satisfaction it gives to them, so if you look it that way, there is no real altruism everyone do things to get something at exchange even it being not monetary.
White collar always is too late, blue collar you should do it ASAP.
I use YouTube Music installed as a brave app with ads block on. I'm always connected to internet so I save storage space and time watching ads.
Organic