It's not because he's not interested in you, and a strip show probably will only help temporarily.
If anything it will put him under pressure to get turned on.
How much does he drink?
I had this problem a few months ago, I was drinking a ****load, and I also wasn't working out as regularly as I used to.
I had moodswings, sometimes felt really down but usually OK, wasn't that interested in sex even though I still fancied my girlfriend.
Sometimes I'd make myself have sex, but lose interest halfway through - that went down a treat as you can imagine!
But I've stopped drinking for summer (crazy!) and I'm lifting weights again.
After just a few weeks, my sex drive went completely through the roof, and my sexual perfomance all round is much higher as well (harder, longer lasting, etc).
So my key recommendation is, if he drinks or smokes weed, stop - it will make a huge difference to his sex drive and performance.
Secondly, hit the gym and lift some heavy weights, and particularly focus on working out the legs (do some heavy squats) - this boosts testosterone majorly, as well as releasing lots of those endorphins, and the end result is a happy and very horny boy.
So yeah, let me know whether he drinks much, and how much exercise or sport he does, and also what pills he's on, and if that isn't it I'll offer some other ideas.
Bob.