It's possible for any man to ask for sex in a relationship, but is left for you as a lady to know that sex, can't keep him..( Sex isn't enough)
There are two major factors ladies complain about sex in a relationship:

√ After giving him my body he left me..
√ He left because I refused to have sex with him..
NOTE: Both those who gave and those who refused to give are complaining...
( What's the difference)

Ladies Listen, Sex isn't enough, its not the only thing you can offer a man.
If You Don't Have Anything To Offer A Man Outside Sex, Please remain Single...
A man can't stay with you because his having sex with you....

Relationship is not buying and selling.
There are much to life than Monkey style, Doggy style, Missionary style, Apple n juice style, step pillows style, etc ...
Are you sound intellectually? Spiritually? Physically? Mentally? Emotionally?

Men love intelligent ladies...
Men love ladies with ideas..
Men love respectful ladies...

Sex is very cheap these days, anybody can buy it.
You need to build yourself beyond sex.
Leave make ups and be a productive lady.
Men are looking for ladies with ideas and solution not those who paint their faces with different colours.

What a man wants is beauty with brain not make ups with boobs or hips....