if so, does it work the same way for pan? wouldn't you technically have an infinite number of virginities...? or is there just an umbrella gender variant virginity hahaha

It totally depends on the individual and their personal belief system. I believe you can have sex with a man and lose your virginity and have sex with a woman and lose your virginity in a different way, just like you can have anal sex and still be a virgin vaginally or have vaginal sex and be a virgin to anal. It is totally dependent on the person in my opinion

What is the use of "virginity" as a concept?
Is it at all useful for a person to define themselves as sexually pure?
How about looking at sexual experience as something to be gained (when you want to), rather than something to be "lost"?

I'm pan, and I've stopped really using the concept of virginity when describing my sexual life. I've had a lot of different sorts of sexual experiences with people, and it doesn't feel right to me to privilege just one of those experiences as the first "real" sex I ever had. I feel like they're all real sex. I mainly use the term virginity in a silly way to refer to nonsexual things - like losing my sushi-eating virginity, or my Rocky Horror Picture Show-watching virginity.

I absolutely believe in the idea of infinite "virginities". I think every "first" you have is new and profound and exciting or sometimes scary. Some have more impact on us than others. My first sexual experience was with a man, but once I came out a lesbian and had my first experience with a woman, that was even more meaningful to me in many ways. The fact that there had previously been a penis in my vagina in no way cheapened or diluted or devalued my first experience with a woman. I've had all kinds of firsts and each of them have been powerful. Before my first intercourse I'd had firsts of other kinds and there's no real moment when something about me changed or was "lost" so I couldn't truly pinpoint when my virginity was "lost". I much prefer the idea, as others have said, of gaining the experience as opposed to "losing" anything. The concept of the hymen is mostly myth and superstition and old wives' tales so that measure of virginity is entirely false and there is simply nothing so magical about penis-in-vagina sex that alters a person in any real way. Virginity is an antiquated, irrelevant, highly misogynistic ideal that has damaged, sometimes ruined, lives and reputations, given rise to moronic, demoralizing, offensive and embarrassing rituals and oppressed sexuality and inspired shame, especially in women, for thousands of years. Historically, the purpose of "virginity" is mainly concerned with suppressing and oppressing females and their sexuality and keeping women under the control of men. This may make me sound like a feminazi but I'm really not. I promise. I just think "virginity" deserves little to no modern attention or concern and should not be a prevalent part of our societal or sexual values.

I'm not sure what I believe, virginity is an interesting topic, I don't consider myself a virgin even though I have only had sex with a man (despite my attraction to women). Everything new we try (anal sex, sex with a woman etc.) is an interesting experience but I don't know if I'd call it loosing my virginity again. Virginity is such a strange concept anyway, I think it's up to each person to define for themselves.