Yes Dot but if the over abundance of fibre in their diets makes them , erm , loose, then the pill may be rendered ineffective and the woman could quite literally be left holding the baby.
No I would not trust my husband to take a male contraceptive pill as a form of contraception for two reasons.
1. He's a man. This needs no further explanation lol.
2. Until the day dawns when men are capable of growing a womb to support a developying embryo and can experience childbirth, I will continue to take control in the contraception stakes.