THE days when skin care was exclusively for women have passed. These days, more and more men are venturing into the women's-only realm of the beauty salon. Of course, there are others who lag behind, but that will change. Ironically, back when men wore breeches and frilly shirts, they also used as much scent and talc, fussed as much over their skin, painted on the odd beauty spot and dabbed on rouge just like the women of the period. Well, few would want to see a return to those times. But men are now starting to look longer and more closely in the mirror and cosmetics companies are out to nab the masculine market. They are playing up to emerging male vanity by playing down the products, toning down packaging and offering largely unscented toiletries. Typically men's products are packaged in neutral colours - grey, black and white - for the man who would prefer his side of the bathroom was not a mirror image of his female partner's. The Body Shop has do-it-yourself indulgences for men in its Mostly Men range in the easily identifiable black and white packaging. Taking the attitude that skin care for men should be as easy and enjoyable for men as it is for women, the range was launched in late 1986 and has gone a long way to making shaving enjoyable. But The Body Shop does not stop with a man's face. It has also included hair and body care products to make sure that what is below the neck looks as good as what is above it. There are 30 Mostly Men products to choose from and prices range from $15 to $85. For colour and fragrance there are almost 450 products to choose from, with the vast majority suitable for both men and women. Ice blue shampoo and banana conditioner are leaders in hair care and in New York, banana conditioner has become a popular substitute for shaving cream. The Body Shop has an interesting array of hand-made wooden foot and back massagers to ease all and pains from the most stressed-out body. These are perfect presents for overworked fathers who find little time for relaxation. The ''footsie'' rollers and back massagers are made in southern India from a drought resistant wood call Niloticca. For the face, is the new after-shave gel, an alcohol free gel which soothes and moisturises and offers immediate cooling relief from razor burn. It is easily absorbed, fragrance free and suitable for sensitive skins. The face wash is for men who would rather not use soap - usually a preference for little boys, but no doubt there are some men who have never quite accepted the idea of soap! This wash is a vegetable-based cleanser which removes dirt and excess oil without drying the skin. The face scrub contains evening primrose seeds to make a gentle exfoliating treatment which is most effective against blackheads and oily patches. It can also be used on the back and chest. He might be ''rufty tufty'', but if his skin is delicate, he will appreciate the face protector, a combination to cocoa butter and evening primrose oil in a gel-based moisturising cream suitable for all skin types. Shaving cream is coconut-oil based and available in four Mostly Men fragrances - Samarkand, Sandalwood, Jamaica and Mostly Musk - in a tube or a shaving bowl for those who prefer to dip their shaving brush. Finally, when his face is all scrubbed clean and smooth shaven, there is a no-sting, mildly astringent after-shave to splash on. If your dad is a man who really does not like soap, he will revel in the Rhassoul mud shampoo which is made with oil-absorbing mud from the Atlas Mountains in Morocco. It is excellent for oily hair and flaky scalps. If, after he has washed his hair he cannot do a thing with it, treat him to some slick which has camellia oil added for a glossy wet look to his locks. And so, to his body. Rhassoul mud soap is vegetable-based and exfoliates while it cleanses. Shower gel offers an alternative to soap and has astringent herbal extracts which make it suitable to do double duty as a shampoo. Bath beads, talc and deodorant stick, which combines witch hazel, aloe vera and essential oils, complete the Mostly Men range. And a new set of bath and shower gels will join the line-up in September. Deep cleansing bath and shower gel contains tea tree extract which the Body Shop buys as a Trade Not Ai project from the Thursday Island plantation in Australia. Tea tree extract is renowned for its anti-bacterial, anti-inflammatory, anti-fungal properties making it ideal for oily skin which is prone to acne. The fragrance is high in natural notes including melon, lavender, lemon and orange. The Everyday bath and shower gel is a gentle foaming gel with almond extract and is an excellent emollient to counteract the skin-drying effects of frequent washing. It can also be used for the hair and has a fresh tangy, citrus fragrance. The Body Shop has also added another scent to its Mostly Men line with Activist, a fresh, woody fragrance with semi-oriental citrus top notes and warm woody base notes. It used cedar, patchouli, vertivert, sandalwood, amber, orange, rose and lemon to create a rich spicy fragrance. It joins Samarkand and Mostly Musk in the Mostly Men fragrance range and was chosen from a series of panel tests in Body Shops in 10 countries. Body Shop staff from the Far East, Canada, Europe, Britain and the United States tested a huge range of smells and Activist was a clear favourite. The Mostly Men fragrances contain Glucam P20 which is derived from glucose and is a fixative which significantly increases the lasting power of the fragrance. It is also an emollient which has anti-irritant properties, taking the sting out of after-shave.