Before the first kiss or the first date, you need a reason for the audience (or the partner) to care.

: Instead of moving strictly up and down, focus on small back-and-forth or circular grinding movements. This increases clitoral or penile stimulation and reduces exhaustion. Strategic Support

Given the ambiguity, the best approach is to assume the user intended "how to have sex hot top" or "how to have sex - top" (as in being the top in sex). The word "sexhd" might be a concatenation of "sex" and "hd" where "hd" could be "hard" or "hot dog"? No.

Witty banter is a classic way to show attraction. It shows they are intellectually matched and comfortable enough to tease each other.