i have same prob as ur bf. premature ajaculation because i never
see women body... their body dazzling for my eyes.

so what i do is, i tried to masturbate in duration of 1,2,5,10,15 min in order. the longer the period to cum is better.

klu hari2 got some effect, erectile dysfunctions. please avoid it by not doing everyday. so make it got a day or 2 off from masturbate.

im doing it for a year. now i can get even 45 min for full course of sex intercourse...