What do you think of casual sex from mere sexual impulse?

Call me lame but I am chaste. I only want to and would have (mostly) sexual interactions with guys I like. I am sick of arguing with my friends who have no problem having very casual sex. They think I am not ‘living my life’ and I’m being uptight. I dont do it not because I think its not necessary or appealing, I also feel so. I don’t get people who are opposite of me in this sense. I can’t understand them and it drives me insane. Mind a little help? Am I the prude lame girl here?

Taken from Schopenhauer’s Metaphysics of love:

“We have seen in the above that the intensity of love increases with its individualisation, because we have shown that the physical qualities of two individuals can be such that, for the purpose of restoring as far as possible the type of the species, the one is quite specifically and perfectly the completion or supplement of the other, which therefore desires it exclusively. Already in this case a considerable passion arises, which at once gains a nobler and more sublime appearance from the fact that it is directed toward an individual object; thus, as it were, arises at the special order of the species. For the opposite reason, the mere sexual impulse is ignoble, because without individualisation it is directed to all, and strives to maintain the species only as regards quantity, with little respect as to quality. But the individualising, and with it the intensity of the love, can reach so high a degree that without its satisfaction all the good things in the world, and even life itself, lose their value. It is then a wish which attains a vehemence that no other wish ever reaches, and therefore makes one ready for any sacrifice, and in case its fulfilment remains unalterably denied, may lead to madness or suicide. At the foundation of such an excessive passion there must lie, besides the considerations we have shown above, still others which we have not thus before our eyes….”