Help with a testicular massage

He wanted to squirt on my tits - but fucking my udder didn't bring the desired success. So he started to jerk his cock himself and the best way to support him is to massage the testicles. Knead the scrotum - light pressure on the perineum. but he still does not orgasm. Maybe I should pick up his penis and help him masturbate. But think that will not do anything with sperm on the boobs.