Girls, do you or your partner like grabbing hold of your nipples (or pinching the tips of them?) & stretch them out as far as you can tolerate them without hurting & does it arouse you or not? There are sextoys made for this purpose (nipple suckers) as well with rings that go over the back of the nipples when erect to keep them like that for as long as bearable.
Only recently did I realise that I liked having my nipples played with (previously they've been neglected completely). The feeling itself is quite uncomfortable, but the discomfort makes my pussy wet and sure brings me closer to orgasm, so I must like it haha.