You need to learn to ejaculate without orasming. It takes a bit/ lot of practice... but when you're edging... work your kegal muscles on and off... you'll sense you're going to start leaking your cum... if will flow out, not squirt... and if you can achive this... you'll happily lick up every drop. Its more like licking your precum, which is easy because there are no post orgasm blues, but if you can manage this, you'll have your actual white semen leaking the same way... and you definitely won't lose interest... actually the opposite, you can't get enough of it
It takes a bit of practice, and I don't always get it right myself, but do a lot of the time.