Well I don't actually use a bar of soap, in spite of what I said about having soap in Cornwall. Nothing with added perfume of any kind ever touches my skin. I use Simple shampoo both as shampoo and as my "shower gel." I get bottles of it for a quid a time at Poundland. Very gentle, no perfume, no conditioners. The main function of conditioners is to bung up the plug holes once every three months. No split end was ever mended by a conditioner. Extra rinses were mentioned. If I don't give my wash at least three or four extra rinses I get dermatitis in several delicate areas. Washing machines are useless rinsers* and modern detergents are extremely harsh, what with added brighteners, colorants to make them look nice, perfumes, bleaches and enzymes, none of which were even remotely designed with the health of my skin in mind. I don't know much about differences between male and female skin but I do know that it's almost certainly best to avoid bombarding either with chemicals that are designed to sell products rather than look after you. As for your final remark, increase your fibre intake and open the bog window.

*Next time you do a towel wash in your machine, try this: take one clean towel from the wash and give it a good, vigorous hand rinse in a bowl of clean, lukewarm water. You'll be horrified at the soapy smell and the amount of detergent that is still in there, ready to be rubbed briskly into your open pores next time you get out of the bath.