Dear DJ —

No liturgical police are going to show up and haul you away if that's what you're asking. In order to evaluate this act, we have to look at what communion is, and what it means.

In the Catholic understanding, Communion, conceptually speaking, expresses an intimate connection or sharing of spiritual goods. We call the Eucharist "communion" because it is a "union" "with" ("cum" in Latin) God in Christ, whose true Flesh and Blood we believe is made present at the consecration of the bread and wine. St. Paul says,

The word here for "participation" is "koinoneia" which also means communion or fellowship. But it is not just an intimate union with God; it is a union with others who partake of it. The Eucharist, the Body and Blood of Christ, "makes" the Body of Christ, in that the Body of Christ is constituted by the Eucharist. The Body of Christ, in turn, is the Catholic Church and all those who belong to Her, those "in communion" with her, who believe what She believes and are part of Her Family, the household of God. (1 Timothy 3:15)

Consequently, the Catholic Church has always used communion as a way of delineating:

• who belongs to the Catholic Church and
• who does not,
  
  
• who is part of her household, and
• who is not.

Thus, she has what is called "closed communion":

Those who do not believe what She believes, who are not in formal union with Her, are not, in normal circumstances, invited to share in Her Eucharist.

Likewise, we are not allowed to share in the Eucharist of other churches and ecclesial communities because to do so would "share" in something that is not ours.

It's like when you visit someone else's house: If you are not a member of the family, you do not assume the intimate rights of those who belong to the family.

So, to receive communion in the AME, from a Catholic perspective, expresses that you believe and are in union with that church; but that church is separated from the Catholic Church, so in a real sense, you would be spiritually unfaithful to Catholicism to do this. If you did it, you'd be held accountable for it before God on the Day of Judgment. 

Another facet of this is that, as Catholics, we believe that the Eucharist is really and truly the Body and Blood, Soul and Divinity of Christ, our Lord and God. The bread and wine, we believe, are transformed (transubstantiated) by the priest during the Consecration. By sharing in it, we are made "partakers of the divine nature" (2 Peter 1:2-4). We do not believe that this happens in the AME, nor, as far as I know, does the AME believe that it happens. As such, in their communion, you are merely receiving bread and wine (or grape juice, or whatever it is). What you will have in the Catholic Church is so much richer and more meaningful.

• It's like, why look at a pinup girl when you have a beautiful wife to have loving conjugal relations with?

You have to ask yourself why you want to receive communion in a church you no longer share the beliefs of, in an act that they do not believe does what you believe and is merely a simulation of the truth.

In point of fact, you might do well not even to go back to worship with the AME at all after becoming Catholic.  Otherwise, your heart might be drawn away.