I can think of 2 reasons for his behavior right away.
1 He's actually worried that he will made fun of in the way he's referring to it. Let him know there are actual e pipes. Nothing sissy at all about a nice pipe.
2 Deep down he has reservations about his ability to make the switch or he isn't ready yet. By sabotaging you, it takes that pressure off him. It just could be that you need to just say "I'll do my thing and you do yours", and leave it be. Show him with your success that it can be done.
1 He's actually worried that he will made fun of in the way he's referring to it. Let him know there are actual e pipes. Nothing sissy at all about a nice pipe.
2 Deep down he has reservations about his ability to make the switch or he isn't ready yet. By sabotaging you, it takes that pressure off him. It just could be that you need to just say "I'll do my thing and you do yours", and leave it be. Show him with your success that it can be done.