Word Usage – Is “What Is Something Count?” a Natural Question Format?

I would skip referring to "gigabytes" entirely:

How big a hard drive do you need?

And if you are a customer, you ask

What's the biggest drive on the market?

To my (AmE) ears, it seems odd to ask about the number of gigabytes; the thing I'm interested is the size of the drive, and I'd only talk about that until it comes time to specify a number.

People use both come and cum as a verb to mean the experience of having an orgasm, and/or ejaculating, whether ejaculating means secreting semen from a male or (controversially) any fluid that may be secreted from a female, at orgasm; and as a noun meaning semen or (controversially) any fluid that may be secreted from a female during orgasm.

Some forms of these verbs are:

will cum, will come, cummed, came, is cumming, is coming, have cum, have come

Because only a few of the standard recognized resources (dictionaries) describe these words in detail, and because they are generally considered by such as slang, we may not have a great deal of "authoritative" guidance in their spellings and usages.

Some people will say that the words are part of proper or standard English, because many people use those words to have those meanings. Some people say they are vulgar or slang, or both.

People say I'm coming or I'm cumming just before orgasm to mean "I am going to (or starting to) have an orgasm," and people can say it seriously, with humor, with passion, as a joke, or in all kinds of ways, just as with most phrases or words. But no, it's not "just a joke."

To enumerate how many times last night, I have only heard or read expressions like I came x times last night and How many times did you come/cum last night? It seems to me that cummed is less often used.

The American Heritage Dictionary defines come but not cum as a verb:

1. Vulgar Slang To experience orgasm.

And come "Also cum" has only one definition as a noun:

n. also cum (kŭm)
Vulgar Slang
Semen ejaculated during orgasm.

And the same dictionary lists cum only as a noun, labeling it a "variant of come", suggesting that "come" may be the more standard or common term:

n.
Vulgar Slang
Variant of come.

With the last line above apparently linking to come in the noun sense, meaning semen.

TFD's Thesaurus lists both come and cum as nouns, e.g.:

Noun 1. cum - the thick white fluid containing spermatozoa that is ejaculated by the male genital tractcum - the thick white fluid containing spermatozoa that is ejaculated by the male genital tract come, ejaculate, semen, seminal fluid, seed

but only come as a verb, semantically tied to "experience; go through":

20. come - experience orgasm; "she could not come because she was too upset".