Oral sex is commonly used as a means of preserving virginity , especially among heterosexual pairings; this is sometimes termed technical virginity (which additionally includes anal sex, mutual masturbation and other non-penetrative sex acts, but excludes penile-vaginal sex).     The concept of "technical virginity" or sexual abstinence through oral sex is particularly popular among teenagers,    including with regard to teenage girls who not only fellate their boyfriends to preserve their virginities, but also to create and maintain intimacy or to avoid pregnancy.  Other reasons given for the practice among teenage girls are peer-group pressure and as their introduction to sexual activity.  Additionally, gay males may regard fellatio as a way of maintaining their virginities, with penile-anal penetration defined as resulting in virginity loss, while other gay males may define fellatio as their main form of sexual activity.  
I am a step-mother of a 24 year old girl and a 19 year boy. For 6 years I’ve sat back and watched these step kids gladly take all the gifts that are given to them by my husband and I. This year they didn’t even buy their father a single gift! This has been happening for 6 years and I’m feed up. They gladly take the money, gifts and free food. They don’t even offer to bring a dish for dinner. I blame my husband for raising such inconsiderate kids. Why would these kids think that a part of joy is give a gift from the heart. It doesn’t have to be expensive. Please, please help me with a realistic explanation.