People have different motivations for buying personal lubricant. Whether you’re trying to lubricate your back door, which has no natural lubrication like the vagina does, or you're trying to supplement your body's natural moisture to make sex more comfortable, a high quality water-based lubricant like Ultra Lube is your best bet. It is long-lasting, colorless, odorless, non-staining, and washes off easily. The only downside is, well, it washes off easily. Because it's water solluble, it's easily absorbed by skin and so you may need to reapply once or twice during the action. It is safe to use during sex, as well as with all toys and condoms.