Love is a universal concept and appears when you have very passionate feelings for another person. Although love is different in everyboody there are a lot of types of love.
On the one hand, I agree with people who have sex without love because there are people who don't like to have a partner and they don't like having to explain anything to anyone. Also there are people who have had bad experiences of love and then they think that there is not love.
On the other hand, I disagree with this because there are people who this to hurt others because the other person has fallen in love and they only want sex.
In my opinion I believe that everyone has to fall in love once in life because this feeling is very nice. Although I think that also you have to enjoy life and youth. Love comes when you least expect it.