Found an interesting Thai to explain. Here I go...

MC2: On the opening event of BOYFRIENDS, you (Mew) sent him (Gulf) a sunflower bouquet. So, on Gulf's graduation day, what type of flower that'll suit him kha?

#MewGulfLuvSmoothSale

MC2: Maybe... 1 field of sunflowers?
M: Hooo ... *turn to Gulf* what kind of flower do you want krub pom?
G: *smile* wh- what kinds of flower are there krub?
MC1: Waanjais said that they can't think about good things at all 555 for this question

#MewGulfLuvSmoothSale

MC2: Actually, I didn't think like that at first, but when you guys shouted out, it just popped up in my mind like ... yeah 555
M: *tun to Gulf* Do you ever want Dok Rak krub?
G: You mean the garland? 555 *Mew nod*

#MewGulfLuvSmoothSale

MC2: Look ... if Gulf didn't end it as the garland, I'd think it's an actual Dok Rak kha
MC1: How many Dok Rak do you want? Please tell Khun Mew so that he can send you the right amount ... How many do you want it?

#MewGulfLuvSmoothSale

G: Well ... one garland does use lots of Dok Rak na krub
MC1: Ummm
MC2: So, one garland ...
M: Oh, you want lots of it?
*Fans scream*
G: DOK RAK, DOK RAK
M: That's what I meant, Dok Rak *smile*

#MewGulfLuvSmoothSale

MC2: Khun Aek, I tried to help already kha. I was about to say that he meant to give a Dok Rak garland, which represents love and respect to the one we love. If it's more than this, I'd like to let it pass na kha 555
MC1: Yeah, we could get a heart attack

#MewGulfLuvSmoothSale

#ThaiwithNet
Let me break it down step by step

ดอกรัก (Dok Rak) or crown flower (Calotropis gigantea) or "Love Flower" is normally used as parts to make a garland in Thailand. The flower is a symbol of love in a way and is used in wedding and religious ceremony.

#ThaiwithNet

ดอก (Dok), one word alone commonly refers to "flower" [full word ดอกไม้ (Dok Mai)] . However, it's also a slang refer to "the amount of time for having sex". That's why MC and fans said that they can't think of good things.

#ThaiwithNet

On Valentine's Day, Thai lovers have this teasing phrase like

วันนี้อยากได้กี่ดอก

Trans: Today, how many flowers do you want?

But it also has a hidden meaning as

Today, how many times do you want it (sex)?

That's why fans were screaming in their convo here.

#ThaiwithNet

Additionally (Not related to MG interview, but I want to share as precaution)...

ดอก (Dok) can also be used as a curse word or swearing as well, normally use in full as "อีดอก (E-dok)" meaning "b***h or sl*t"

So watch out if you use it.