[Ribs. Noted down. He'll come back to those bits later.]

Well, in crude terms, yes. . . The bulbs are. However, they're not out like this all the time. They dilate like this whenever a spider is sexually mature or sexually active. The pediplaps themselves are organs I use for sensing things and tasting.

[He blinks and sighs]

Please don't compare my legs with yours. They are different.