Anus gets wet when aroused

For some time now I've noticed that my anus gets wet when I'm aroused, mostly after I orgasm. At first I thought that the wetness was coming from my vagina, but soon I came to realize that it was my anus only, it even happend once that my vagina was not wet at all, but my anus was, extremly. The fluid coming from it is almost the same as the wetness from vagina, it's very clear. I talked to my gay friend if this ever happend to him or someone he knows, and he told me that it can happen to men, because of their prostate, but that is it very weird that it is happening to me.

I never had anal, I lost my virginity not long ago, but with a very experienced man, and he has been suggesting for some time now that we try inserting his finger into my anus, but I still haven't told him this. I agreed to try, but I feel like he would like anal sex soon, and I am very scared to try it. But because of this that is happening, I feel like I should try, and that it might even feel nice. The idea of anal sex turns me on, but I don't think I'm still brave enough to do it.

Opinions?

Anybody had a similar experience?

Does this mean that anal sex would give me more pleasure?