Phantasm,
I hope you can tolerate all our joking ;)
To give you a perfectly serious answer, it seems unlikely that orgasm/ejaculation has any substantial impact on man’s overall testosterone/DHT levels. As Westla suggested, the great majority of variation in men’s balding is due to genetic variation, not differences in lifestyle. Some guys have noticed an increase in balding when they hit the gym hard (you can find some threads on this if you do a Search for stuff on balding…), but even this is quite controversial.