A small word of warning ... before you start poking around their backside, make sure that your partner is ok with it. Some people are not, and won’t react gently when they feel an "intruder”". Some men will be uncomfortable with the idea initially, because of taboos of supposed Homosexual behavior. Let us put your mind at rest; anal play is thoroughly enjoyed by heterosexuals as well.
If you want to try analingus, but your partner doesn’t, don’t try to force them! You have a much better chance that they will try it if you have their cooperation, rather than arguing with you. Bring the topic up gently on occasion, and help them open up to this experience by getting them comfortable in the area and with the idea.
Cleanliness is essential with virtually all forms of this type of play. Before engaging in Analingus, make sure to thoroughly wash the area. A bath or a shower is a great primer, and can be the start of the festivities. Once clean, licking this area of the body is virtually no different than licking any other, and can be very stimulating for both you and your partner.
Without going too close to their anus, explore their inner thighs and bottom with your hands and mouth. Some people (especially women) have had bad experiences with anal play in their history, mostly because their partner moved much faster, or less gently, than they should have. If this is true in your case, getting them to talk about the topic is a great way to start. By learning where they went wrong, you can prevent that experience from happening again.
A great way to start performing analingus is to move into it after the giver performs fellatio/cunnilingus. The area is really sensitive, so run the tongue around in circular motions, use the tongue to tickle, and when you are both ready for it, even to penetrate.
Access to the anus is a little tougher than to a vagina, but there are several positions that are ideal: laying the receiver on their back with a large pillow to arch their bottom up; the receiver sitting on the giver's face; the receiver bent over with legs spread; the receiver laying on their back pulling their legs back, and the receiver upside down with their legs spread.
Once any part of the giver has been inside the receiver's anus, it should not be put in anywhere else until cleansed. For Analingus a mouthwash/ teethbrushing should suffice. Carelessness in this regard can cause a very serious infection.
There are many nerve-endings around the anus that can make this form of sex-play an absolute blast for both men and women... turn-off the taboos and get totally turned-on!