deadlift

I recently started doing dead lifts (after a decade of pause). Context: I'm only lifting my own body weight, still grip strength is limiting my repetitions. How have you guys developed sufficient grip strength for dead lifts?

Recently I have started getting accidental ejaculations during heavy deadlifts, usually after rep 6 with 120kg or so, with each rep I have a feeling as if I was peeing (no, no pleasure at all), but it's really semen. This happens EVERY week, regardless of anything else going on in the love life...