what is the meaning of Biu?

wel

On some ads they mention biu in some of the descriptions.  What do these sentences mean?

願嘗試跪吹服務可biubiu入口 (can try kneel down and what?)
BiuBiu全身
無條件配合Biu嘴 (no restriction to what?)可以接受biubiu入嘴

jackastor

Means shoot. Biu biu is sound of firing bullets. In this context it means shooting something else. You know what I mean.

MayJing

The Chinese pinyin transliteration of "pew pew".