1: Feeding each other by mouth meets the hygiene requirements (provided that both of you are not sick). Swallowing each other's saliva won't make you sick.

2. Eating apples together is the sweetest, one bite for each person.

Couples usually feed each other apples and peel them a little.

The saliva that melts with the lips when eating together is called jade liquid, which sounds the best.

3. There are many oral sex games between two people. The more interesting ones are: the length of kissing, kissing each other's private parts (two people are upside down), blowing balloons face to face until the balloons explode.