The feeling of pleasure is doubled. It can be, but good anal hygiene will address most of those concerns. Like vaginal dildos, these are pretty similar, with the difference that they are flare-based. Your testicles, for example, have almost as many nerve endings as your penis. Moreover, a tremendous amount of tension and nervousness can easily manifest in the constriction of the external sphincter; thus, the anus gets tightly clamped, making it difficult to pass anything through it. Masturbation is a healthy, natural way to explore your fantasies and discover what makes you feel good. Too, it’s a very exciting practice that will help relax the sphincter further.
A cheap and effective alternative is organic coconut oil, which is the only cooking oil that is suitable as a sexual lubricant, due to its anti-bacterial properties. The main reason for this is hygiene: the water serves to clear away any, erm, bits and pieces that are hanging around up there.