Whether it's due to looks, charisma, social status, charm, or any other factor, guys who are considered sexually attractive to women tend not to have a "scarcity mentality", wherein they feel an intense insecurity over whether any individual girl considers them attractive. This scarcity mentality seems to be the origin of 90% of the butthurt from guys on this subreddit.

It seems that the average guy here wants to be considered "fuck on first sight" material by women, and would accept a long term relationship ONLY under the condition the girl she's with never hooked up with other guys in the past. In his mind, the fact that she hooked up with some other guy but not with him indicates that she values him less and sees him as less attractive.

Now this may be true in some cases, but in the grand scheme of things, if you're not operating from an intense scarcity mentality, that shouldn't matter to you. If you're going on a date with a girl, you should be interested in her as a person, whether or not she wants to fuck right away or after some time getting to know you.

Let's say a guy has a date with a girl, and she makes some mention of him being perfect "boyfriend material".

Someone who knows how to talk to women, who understands when girls are flirting with him and doesn't put pussy on a pedestal will think:

"Ah, so she cares for me and wants to go slow. That's fine with me and totally up to her. If I'd prefer a strictly sexual relationship, I'll tell her and break up, but if I like her I'll take it slow with her."

While a guy with a naturally attention-starved scarcity mentality will think:

"Why does she not see me as hook-up material?? Am I not hot enough? Would she want to fuck me right away if I were hotter? Why don't I meet the standard that would make her want to fuck me right away? She must consider me a sexually worthless, exploitable beta male"

If your line of thought resembles the second one, you should be lucky she's even considering you worth eventually fucking at all.

It's kind of like the maxim "People will tell you if you're attractive, but if you're ugly you have to find out for yourself." If you're someone for whom regular hookups are a natural option, being labeled "boyfriend material" by one woman doesn't matter, you understand women have different preferences at different points in their life. Even if she fucked other guys on the first date and wants to go slow with you, you know that you could get a hook-up somewhere else, so it doesn't bother you that this specific woman cares about you enough to want to take it slow.