It is a good idea to put the object you use inside latex condom for hygiene and lighter feel. Objects to consider using include articles of clothing, especially if sexy, like bras, panties, or other lingerie stimulating. Test stockings, socks, handkerchiefs, towels, feathers and brushes. Don't use anything sugary to avoid yeast infection. If the object you use is in condom, you can use a lubricant to overcome dry friction.
Women can use anything vibrating.
Vibrating electricals are practically always made of plastic, so it is advisable to wrap cloth or leather around it to avoid direct contact with plastic. Use such objects lightly, don't overrush to hurt yourself. Finally, woman can use dildos as insertee devices. For best results, she should keep the dildo inside vagina fairly steady while masturbating her clitoral area. Penetration is not really necessary for most women to achieve orgasm, but women like the sensation of fullness that a dildo provides.